WO2021200772A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2021200772A1
WO2021200772A1 PCT/JP2021/013167 JP2021013167W WO2021200772A1 WO 2021200772 A1 WO2021200772 A1 WO 2021200772A1 JP 2021013167 W JP2021013167 W JP 2021013167W WO 2021200772 A1 WO2021200772 A1 WO 2021200772A1
Authority
WO
WIPO (PCT)
Prior art keywords
main body
power storage
lid
storage device
reinforcing member
Prior art date
Application number
PCT/JP2021/013167
Other languages
French (fr)
Japanese (ja)
Inventor
綾一 寺原
訓良 胸永
Original Assignee
株式会社Ｇｓユアサ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｇｓユアサ filed Critical 株式会社Ｇｓユアサ
Priority to DE112021002056.0T priority Critical patent/DE112021002056T5/en
Priority to US17/915,950 priority patent/US20230170571A1/en
Priority to CN202180024069.6A priority patent/CN115362594A/en
Priority to JP2022512175A priority patent/JPWO2021200772A1/ja
Publication of WO2021200772A1 publication Critical patent/WO2021200772A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a power storage device and a power storage device including an exterior body that houses the power storage element.
  • Patent Document 1 discloses a power storage device including a power storage element and an exterior body in which the power storage element is housed.
  • a recess is formed in the outer peripheral wall of the exterior body, and a reinforcing member for improving the rigidity of the exterior body is arranged in the recess.
  • the reinforcing member is provided in an endless shape so as to surround the four side walls of the main body of the exterior body. As a result, deformation of the side wall of the exterior body can be suppressed.
  • the pressure inside the exterior body (internal pressure) rises sharply, and the exterior body receives a force (internal pressure) from the inside.
  • This internal pressure acts not only on the main body of the exterior body but also on the lid that closes the opening of the main body. That is, the lid body is in a state of receiving a force in the direction of detaching from the main body from the inside.
  • the present invention has been made by the inventor of the present application paying new attention to the above problems, and an object of the present invention is to provide a power storage device with improved safety.
  • the power storage device includes a main body for accommodating a power storage element, and an exterior body having a lid that closes the opening while being integrally joined to the opening of the main body.
  • a contact portion that regulates the movement of the lid body in a direction away from the opening by abutting on the upper surface of the lid body that is a surface opposite to the main body portion, and a fixing fixed to the main body portion. It is provided with a regulating member having a portion.
  • FIG. 1 is a perspective view showing the appearance of the power storage device according to the embodiment.
  • FIG. 2 is an exploded perspective view of the power storage device according to the embodiment.
  • FIG. 3 is a perspective view showing the configuration of the regulatory member and its surroundings according to the embodiment.
  • FIG. 4 is a plan view of the power storage element according to the embodiment.
  • FIG. 5 is a first cross-sectional view showing the structural relationship between the regulatory member and the exterior body according to the embodiment.
  • FIG. 6 is a second cross-sectional view showing the structural relationship between the regulatory member and the exterior body according to the embodiment.
  • FIG. 7 is a schematic view showing the positional relationship between the regulating member and the joint portion according to the embodiment.
  • the power storage device includes a main body for accommodating a power storage element, and an exterior body having a lid that closes the opening while being integrally joined to the opening of the main body.
  • a contact portion that regulates the movement of the lid body in a direction away from the opening by abutting on the upper surface of the lid body that is a surface opposite to the main body portion, and a fixing fixed to the main body portion. It is provided with a regulating member having a portion.
  • the lid body is integrally joined to the opening of the main body, so that the exterior body can ensure high airtightness at the position of the opening.
  • the internal pressure of the exterior body rises sharply, and as a result, the lid body receives a large internal pressure acting in the direction of being removed from the main body portion.
  • the contact portion of the regulating member comes into contact with the upper surface thereof. As a result, deformation or displacement of the lid can be suppressed.
  • the regulating member is fixed to the main body portion at the fixing portion, the effectiveness as a detachment prevention member or deformation suppressing member of the lid body by the contact portion is ensured. As described above, according to the power storage device according to this aspect, safety can be improved.
  • a plurality of the power storage elements arranged side by side in the first direction are housed in the main body portion, and the contact portion of the regulating member is the first portion of the lid body in a top view of the lid body. It may be arranged at the center of the edge portion in one direction in the second direction intersecting the first direction.
  • the contact portion is arranged so as to come into contact with the central portion in the second direction, which is most likely to swell at the edge portion in the first direction (the edge portion extending in the second direction) of the lid body. There is. Therefore, the swelling (deformation) of the lid can be suppressed more efficiently. This contributes to the improvement of the safety of the power storage device.
  • the fixing portion may be extended to a position beyond the central portion of the main body portion in the third direction, which is the alignment direction of the lid body and the main body portion, on the side of the main body portion.
  • the fixed portion can also function as a member for protecting or reinforcing the wall portion of the main body portion by being arranged in a relatively wide range in the third direction. This also contributes to the improvement of the safety of the power storage device.
  • the power storage device may be further arranged outside the wall portion of the main body portion, provided with a reinforcing member fixed to the main body portion, and the fixed portion may be fixed to the reinforcing member.
  • the reinforcing member can suppress the swelling of the wall portion, and the regulating member can suppress the deformation or displacement of the lid body. That is, by combining the regulating member and the reinforcing member, a higher reinforcing effect on the entire exterior body can be obtained. Thereby, the safety of the power storage device can be further improved. Since the regulating member is directly fixed to the reinforcing member, operations such as welding or fastening are easy.
  • the lid body and the main body portion are joined at a joint portion located on the peripheral edge of the opening, and at least a part of the arrangement region of the contact portion in the top view of the lid plate is the joint portion. It may overlap with.
  • the abutting portion since the abutting portion is located directly above the portion where the lid body and the main body portion are joined by welding or adhesion, the abutting portion effectively damages the joint portion such as cracks. It can be suppressed. Therefore, the possibility of internal gas leakage or the like due to damage to the joint is reduced. This contributes to the improvement of the safety of the power storage device.
  • the power storage device is further provided with a reinforcing member that is arranged outside the wall portion of the main body portion and is fixed to the main body portion and is separate from the regulating member, and the fixing portion is lateral to the main body portion. In the above, it may be extended to a position beyond the central portion of the main body portion in the alignment direction of the lid body and the main body portion, and may be fixed to the reinforcing member.
  • the regulating member and the reinforcing member are separate bodies (separate members) from each other, the degree of freedom in the shape and size of the regulating member is high, so that the regulating member is more suitable for the position regulation of the lid. Can be shaped or sized. Since the regulating member is fixed to the reinforcing member, the regulating member and the reinforcing member are structurally placed in a relationship of improving mutual rigidity. That is, the combination of the regulating member and the reinforcing member can obtain a reinforcing effect on the entire exterior body. Further, since the fixing portion is arranged in a relatively wide range in the height direction, it can also function as a member for protecting or reinforcing the wall portion of the main body portion. These things contribute to the improvement of the safety of the power storage device.
  • the direction in which a plurality of power storage elements are arranged is defined as the X-axis direction.
  • the direction in which the electrode terminals are arranged in one power storage element or the direction opposite to the short side surface of the container of the power storage element is defined as the Y-axis direction.
  • the Z-axis direction is defined as the alignment direction of the main body and the lid, the alignment direction of the storage element and the bus bar, or the vertical direction in the exterior body of the power storage device.
  • the X-axis direction may be referred to as the first direction
  • the Y-axis direction may be referred to as the second direction
  • the Z-axis direction may be referred to as a third direction or a height direction.
  • expressions indicating relative directions or postures such as parallel and orthogonal may be used, but these expressions also include cases where they are not strictly the directions or postures.
  • the fact that the two directions are parallel not only means that the two directions are completely parallel, but also that they are substantially parallel, that is, that they include a difference of about several percent. ..
  • the plus side in the X-axis direction indicates the arrow direction side of the X-axis
  • the minus side in the X-axis direction indicates the side opposite to the plus side in the X-axis direction.
  • FIG. 1 is a perspective view showing the appearance of the power storage device 1 according to the embodiment.
  • FIG. 2 is an exploded perspective view of the power storage device 1 according to the embodiment.
  • the power storage device 1 is a device capable of charging electricity from the outside and discharging electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment.
  • the power storage device 1 may be a battery module (assembled battery) used for power storage or power supply.
  • the power storage device 1 is used for driving a moving body such as an automobile, a motorcycle, a watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, or a railroad vehicle for an electric railway, or for starting an engine. It may be used as a battery or the like.
  • Examples of the above-mentioned vehicle include an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and a gasoline vehicle.
  • Examples of the railway vehicle for the electric railway include a train, a monorail, and a linear motor car.
  • the power storage device 1 can also be used as a stationary battery or the like used for home use, a generator, or the like.
  • the power storage device 1 includes a plurality of power storage elements 20, an exterior body 10 accommodating the plurality of power storage elements 20, and a reinforcing member 100 attached to the exterior body 10.
  • eight power storage elements 20 are housed in the exterior body 10.
  • the number of power storage elements 20 included in the power storage device 1 is not limited to eight.
  • the power storage device 1 may include one or more power storage elements 20.
  • one power storage element row 24 is formed by a plurality of power storage elements 20 arranged in the X-axis direction.
  • the power storage element row 24 may have a spacer, an insulating film, or the like (not shown).
  • the exterior body 10 has a main body 12 and a lid 11 for accommodating the power storage element row 24, and a bus bar plate 17 is arranged between the power storage element row 24 and the lid 11 housed in the main body 12. ing.
  • a plurality of bus bars 33 are held on the bus bar plate 17, and the plurality of bus bars 33 are covered with the bus bar covers 70 and 75.
  • a connection unit 80 including a control circuit and the like is arranged between the bus bar plate 17 and the lid 11.
  • the exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the outer shell of the power storage device 1. That is, the exterior body 10 is a member that fixes the power storage element row 24, the bus bar plate 17, and the like at predetermined positions, and protects them from impacts and the like.
  • the exterior body 10 includes, for example, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (including modified PPE).
  • PET polybutylene terephthalate
  • PEEK polyether ether ketone
  • PFA tetrafluoroethylene / perfluoroalkyl vinyl ether
  • PES polyether sulfone
  • ABS resin or , It is formed of an insulating member such as a composite material thereof, or an insulating coated metal or the like.
  • the lid 11 of the exterior body 10 is a rectangular member that closes the opening 15 of the main body 12, and has an external terminal 91 on the positive electrode side and an external terminal 92 on the negative electrode side.
  • the external terminals 91 and 92 are electrically connected to a plurality of power storage elements 20 via the connection unit 80 and the bus bar 33, and the power storage device 1 receives electricity from the outside via the external terminals 91 and 92. It charges and discharges electricity to the outside.
  • the external terminals 91 and 92 are formed of, for example, a conductive member made of metal such as aluminum or an aluminum alloy.
  • the lid 11 has a ventilation chamber (not shown) through which gas moving from one of the inside and outside of the exterior body 10 passes, and an exhaust pipe 90 communicating the inside of the ventilation chamber and the outside of the exterior body 10. And are provided.
  • the gas inside the exterior body 10 is discharged to the outside of the exterior body 10 through the ventilation chamber and the exhaust pipe 90.
  • a valve member that is opened when the internal pressure (internal pressure) of the exterior body 10 rises to a predetermined value is arranged. Therefore, even when foreign matter such as water or dust flows into the ventilation chamber through the exhaust pipe 90 in a normal state, the valve member substantially prevents the foreign matter from flowing into the exterior body 10. NS.
  • the valve member is opened and the gas inside the exterior body 10 is exhausted through the ventilation chamber. It is discharged from the pipe 90 to the outside of the exterior body 10.
  • the main body 12 of the exterior body 10 is a bottomed rectangular cylindrical housing (housing) in which an opening 15 for accommodating the power storage element row 24 is formed. With the opening 15 closed by the lid 11, the peripheral edge of the opening 15 and the lid 11 are joined, for example, by heat welding. As a result, the airtightness at the opening 15 is ensured.
  • the power storage element 20 is a secondary battery (cell battery) capable of charging electricity and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. ..
  • the power storage element 20 has a flat rectangular parallelepiped (square) shape, and in the present embodiment, as described above, eight power storage elements 20 are arranged in the X-axis direction.
  • the power storage element 20 includes a metal container 21.
  • the container 21 is a square case having a pair of long side surfaces 21a facing each other and a pair of short side surfaces 21b facing each other.
  • An electrode body, a current collector, an electrolytic solution, and the like are housed inside the container 21.
  • each of the plurality of power storage elements 20 is arranged in a row in the X-axis direction in a posture in which the long side surface 21a faces the X-axis direction (the short side surface 21b is in a posture parallel to the X-axis direction).
  • the lid plate 21c of the container 21 is provided with metal electrode terminals 22 (positive electrode terminal and negative electrode terminal) electrically connected to the electrode body inside the container 21.
  • the lid plate 21c of the container 21 is further provided with a gas discharge valve 23 for discharging the gas inside the container 21 to the outside.
  • the gas discharge valve 23 opens (opens) the gas inside the container 21 when the internal pressure of the container 21 rises due to vaporization of the electrolytic solution inside the container 21 to release the gas inside the container 21 to the outside of the container 21.
  • the gas discharge valve 23 having such a function is provided in each of the plurality of power storage elements 20. In the present embodiment, as shown in FIG. 2, each of the plurality of power storage elements 20 is arranged in a posture in which the gas discharge valve 23 faces the positive side in the Z-axis direction.
  • the power storage element 20 is not limited to the non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery, or may be a capacitor. Further, the power storage element 20 may be a primary battery that can use the stored electricity without the user having to charge the battery. Further, in the present embodiment, the rectangular parallelepiped shape (square) power storage element 20 is illustrated, but the shape of the power storage element 20 is not limited to the rectangular parallelepiped shape, and a polygonal column shape other than the rectangular parallelepiped shape, a cylindrical shape, and the like. It may have a long cylindrical shape or the like. Further, a laminated type power storage element may be provided in the power storage device 1 as the power storage element 20.
  • the bus bar 33 is a rectangular plate-shaped member that is arranged on at least two power storage elements 20 while being held by the bus bar plate 17 and electrically connects the electrode terminals 22 of the at least two power storage elements 20 to each other.
  • the material of the bus bar 33 is not particularly limited, and may be formed of a metal such as aluminum, aluminum alloy, copper, copper alloy, stainless steel or a combination thereof, or a conductive member other than metal.
  • five bus bars 33 are used to connect two power storage elements 20 in parallel to form four sets of power storage element groups, and to connect the four sets of power storage element groups in series. ing.
  • the mode of electrical connection of the eight power storage elements 20 is not particularly limited, and all of the eight power storage elements 20 may be connected in series by the seven bus bars.
  • the connection unit 80 is a unit having a plurality of bus bars, a control board, and the like, and electrically connects the power storage element row 24 and the external terminals 91 and 92.
  • the control board included in the connection unit 80 has a plurality of electric components, and these plurality of electric components form a detection circuit for detecting the state of each power storage element 20, a control circuit for controlling charging and discharging, and the like. There is. In this embodiment, the connection unit 80 is fixed to the bus bar plate 17.
  • the bus bar plate 17 is a resin member that holds the bus bar 33.
  • the bus bar plate 17 is a member that holds a plurality of bus bars 33, a connection unit 80, and other wirings (not shown), and regulates the positions of these members.
  • the bus bar plate 17 is provided with a plurality of bus bar openings 17a that hold each of the plurality of bus bars 33 and expose a part of each of the plurality of bus bars 33 to the side of the plurality of power storage elements 20. ..
  • a path forming portion 19 extending in the X-axis direction and projecting to the plus side in the Z-axis direction is provided along the arrangement of the gas discharge valves 23 of the plurality of power storage elements 20. There is.
  • the path forming portion 19 covers all the gas discharge valves 23 from the positive side in the Z-axis direction.
  • path outlets 18 are provided on both the plus side in the X-axis direction and the minus side in the X-axis direction, respectively.
  • the gas discharged from the power storage element 20 mainly passes through the path outlet 18, and is discharged to the outside of the exterior body 10 through the above-mentioned ventilation chamber and exhaust pipe 90.
  • the bus bar plate 17 configured in this way is fixed to the main body 12 of the exterior body 10 by a predetermined method such as adhesion or heat welding.
  • Each of the bus bar covers 70 and 75 is a resin member that covers the plurality of bus bars 33 from above, and plays a role of electrically insulating the plurality of bus bars 33 and the connection unit 80.
  • the reinforcing member 100 is a member that reinforces the exterior body 10.
  • the reinforcing member 100 is arranged so as to surround the exterior body 10, and when the exterior body 10 tries to expand due to an increase in internal pressure, the expansion can be suppressed.
  • the power storage device 1 further includes a regulation member 200 fixed to the main body 12 of the exterior body 10.
  • a regulation member 200 fixed to the main body portion 12 via the reinforcing member 100, and these regulating members 200 mainly serve to hold down the lid body 11.
  • the regulating member 200 has a contact portion 201 and a fixing portion 202.
  • three regulating members 200 are fixed to the reinforcing member 100, and in order to distinguish these three regulating members 200, different reference numerals (210, 220, 230) are used as shown in FIG. Is attached.
  • FIG. 3 is a perspective view showing the configuration of the regulating member 200 and its surroundings according to the embodiment.
  • FIG. 3 shows a state in which the reinforcing member 100, the regulating member 200, and the spacers 151 and 152 are separated from the exterior body 10.
  • FIG. 4 is a plan view (viewed from the plus side in the Z-axis direction) of the power storage device 1 according to the embodiment.
  • FIG. 5 is a first cross-sectional view showing the structural relationship between the regulating member 200 and the exterior body 10 according to the embodiment. In FIG. 5, the end portion on the minus side in the Y-axis direction in the VV cross section of FIG. 4 is shown.
  • FIG. 5 is a perspective view showing the configuration of the regulating member 200 and its surroundings according to the embodiment.
  • FIG. 3 shows a state in which the reinforcing member 100, the regulating member 200, and the spacers 151 and 152 are separated from the exterior body 10.
  • FIG. 4 is a plan view (viewed from the plus side
  • FIG. 6 is a second cross-sectional view showing the structural relationship between the regulating member 200 and the exterior body 10 according to the embodiment.
  • FIG. 7 is a schematic view showing the positional relationship between the regulating member 200 and the joint portion 14 according to the embodiment.
  • the restricting member 200 includes a contact portion 201 that abuts on the upper surface 11a of the lid body 11 that is opposite to the main body portion 12 and a main body. It has a fixed portion 202 fixed to the portion 12. The contact portion 201 abuts on the upper surface 11a to restrict movement in the direction away from the opening 15 (see FIG. 2) of the lid 11.
  • the regulating member 200 is made of a metal such as iron or an aluminum alloy.
  • the power storage device 1 is provided with three regulation members 200 (210, 220, and 230) as shown in FIGS. 2 and 3.
  • the regulating member 210 has a contact portion 211 and a fixing portion 212
  • the regulating member 220 has a contact portion 221 and a fixing portion 222
  • the regulating member 230 has a contact portion 231 and a fixing portion. It has 232 and.
  • the fixing portions 212, 222, and 232 of the three regulating members 210, 220, and 230, respectively, are fixed to the main body portion 12. Specifically, the fixing portions 212, 222, and 232 are fixed to the main body portion 12 via the reinforcing member 100. Welding or fastening with bolts or rivets is used for this fixing.
  • the contact portion 201 may be in direct contact with the upper surface 11a, or may be indirectly in contact with the upper surface 11a with another member in between.
  • the reinforcing member 100 is an annular member formed along the four wall portions 13 of the exterior body 10 in a top view (when viewed from the plus side in the Z-axis direction).
  • the four wall portions 13 included in the exterior body 10 form the wall portions 13a and 13c forming the short side surface of the exterior body 10 and the long side surface of the exterior body 10. It is distinguished from the wall portions 13b and 13d. That is, the fixing portion 212 of the regulating member 210 is arranged so as to face the wall portion 13b.
  • the fixing portion 222 of the regulating member 220 is arranged so as to face the wall portion 13a.
  • the fixing portion 232 of the regulating member 230 is arranged so as to face the wall portions 13c and 13d.
  • the reinforcing member 100 is a member made of a metal such as iron or an aluminum alloy, and as shown in FIG. 3, the spacers 151 and 152 are interposed between the reinforcing member 100 and the exterior body 10. It is fixed to the exterior body 10.
  • the spacers 151 and 152 are members made of mica or resin, protect the exterior body 10 from the reinforcing member 100 having a higher rigidity than the exterior body 10, and electrically protect the exterior body 10 and the reinforcing member 100. It is a member that insulates.
  • a mica molded product or a resin having electrical insulation such as PP, PC, or PE is adopted as in the case of the exterior body 10.
  • the contact portions 201 of the plurality of regulating members 200 are arranged so as to press the peripheral edge portion on the upper surface 11a of the lid 11 downward (minus side in the Z-axis direction).
  • the upper surface 11a is a substantially rectangular shape having four sides in a top view, and the range including the central portion of each of the four sides is suppressed by the three regulating members 200. Therefore, even if the lid 11 is deformed or displaced so as to be detached from the main body 12 due to the increase in the internal pressure of the exterior body 10, the deformation or displacement is suppressed by these three regulating members 200. Will be done.
  • the lid 11 whose movement in the direction away from the main body 12 of the lid 11 is restricted by the contact portion 201 of the regulating member 200 is joined to the main body 12 at the joint portion 14.
  • a joining method that makes it impossible to attach / detach after joining in other words, a joining method that does not assume attachment / detachment
  • heat welding or adhesion is adopted. That is, after the lid 11 is joined to the main body 12, it is practically possible to remove the lid 11 from the main body 12 without destroying, damaging, or deforming at least one of the lid 11 and the main body 12. Is impossible.
  • the joint portion 14 formed by heat welding or the like is located on the peripheral edge of the opening portion 15 (see FIG. 2) of the main body portion 12. As a result, the exterior body 10 can ensure high airtightness at the position of the opening 15.
  • the power storage device 1 has a main body 12 for accommodating the power storage element 20 and a lid for closing the opening 15 in a state of being integrally joined to the opening 15 of the main body 12.
  • An exterior body 10 having a body 11 and a regulating member 200 are provided.
  • the regulating member 200 has an abutting portion 201 that regulates the movement of the lid 11 in a direction away from the opening 15 of the lid 11 by abutting the upper surface 11a, which is a surface opposite to the main body 12. It has a fixing portion 202 fixed to the main body portion 12.
  • the exterior body 10 can secure high airtightness at the position of the opening 15.
  • the internal pressure of the exterior body 10 rises sharply, and as a result, the lid body 11 receives a large internal pressure acting in the direction of being removed from the main body portion 12.
  • the power storage element 20 opens and the gas is discharged, the internal pressure of the exterior body 10 in an airtight or semi-airtight state rises sharply.
  • the exhaust gas from the exhaust pipe 90 may not catch up with the increase in the internal pressure, and the internal pressure of the exterior body 10 may increase or the internal pressure may be maintained in a high state.
  • the lid body 11 when the lid body 11 receives a high internal pressure, damage such as cracks may occur in the joint portion 14 which is a joint portion between the lid body 11 and the main body portion 12.
  • the regulating member 200 when the internal pressure of the exterior body 10 rises and the lid 11 is about to be deformed or displaced such as expanding or moving, the regulating member 200 is placed on the upper surface 11a thereof.
  • the deformation or displacement of the lid 11 can be suppressed by the contact portion 201 of the lid 11.
  • the regulating member 200 since the regulating member 200 is fixed to the main body portion 12 at the fixing portion 202, the effectiveness of the contact portion 201 as a detachment prevention member or deformation suppressing member of the lid 11 is ensured.
  • the safety can be improved.
  • the main body 12 accommodates a plurality of power storage elements 20 arranged side by side in the first direction (X-axis direction).
  • the contact portion 201 of the regulating member 200 is the first direction (X-axis direction) of the edge portion of the lid 11 in the first direction (X-axis direction) when the lid 11 is viewed from the side of the upper surface 11a. It is arranged in the central part in the second direction (Y-axis direction) intersecting with.
  • the contact portion 201 hits the central portion in the Y-axis direction where the lid 11 is most likely to swell at the end edge portion in the X-axis direction (the edge portion extending in the Y-axis direction). Arranged to touch. Therefore, the swelling (deformation) of the lid 11 can be suppressed more efficiently. This contributes to the improvement of the safety of the power storage device 1.
  • the fixing portion 202 is arranged side by side of the main body portion 12 from the side of the lid body 11 with the lid body 11 and the main body portion 12. It extends to a position beyond the central portion in the third direction (Z-axis direction).
  • the fixed portion 202 since the fixed portion 202 is arranged in a relatively wide range in the Z-axis direction, it can also function as a member that protects or reinforces the wall portion 13 of the main body portion 12. This also contributes to the improvement of the safety of the power storage device 1.
  • the power storage device 1 further includes a reinforcing member 100 arranged outside the wall portion 13 of the main body portion 12 and fixed to the main body portion 12.
  • the fixing portion 202 is fixed to the reinforcing member 100.
  • the reinforcing member 100 can suppress the swelling of the wall portion 13, and the regulating member 200 can suppress the deformation or displacement of the lid body 11. That is, the combination of the regulating member 200 and the reinforcing member 100 can obtain a reinforcing effect on the entire exterior body 10. Thereby, the safety of the power storage device 1 can be further improved. Further, since the regulating member 200 is directly fixed to the reinforcing member 100, operations such as welding or fastening are easy.
  • the fixing portion 202 of the regulating member 200 also has a function of improving the rigidity of the reinforcing member 100.
  • the fixing portion 202 is arranged on the outside of the reinforcing member 100 and is joined to the outer surface of the reinforcing member 100 by welding or the like. Therefore, the regulating member 200 functions as a member for improving the rigidity of the reinforcing member 100 or a member for increasing the thickness of the reinforcing member 100. That is, the fixing portion 202 of the regulating member 200 can improve the reinforcing function by the reinforcing member 100. Further, as shown in FIG.
  • ribs 13e provided on the outer surface of the wall portion 13 of the main body portion 12 are arranged at positions facing the upper end surface of the reinforcing member 100. Therefore, the rib 13e functions as a positioning of the reinforcing member 100 during the manufacture of the power storage device 1 and regulates the movement of the reinforcing member 100 upward (the direction on the plus side in the Z-axis direction) when the power storage device 1 is used. It also functions as a part. Therefore, even if the contact portion 201 receives a large upward force, the reinforcing member 100 to which the regulating member 200 is fixed is substantially unable to move upward by contacting with the rib 13e. It is possible.
  • the contact portion 201 can more reliably suppress the deformation or displacement of the lid body 11.
  • the reinforcing member 100 is configured by superimposing two plate-shaped members in the thickness direction. This configuration is an example, and the reinforcing member 100 is composed of a single material. You may be.
  • the lid body 11 and the main body portion 12 are joined at a joint portion 14 located on the peripheral edge of the opening 15 as shown in FIGS. 5 to 7.
  • each of the arrangement regions of the four contact portions 201 is the joint portion 14. It overlaps with a part of the extending direction, and overlaps with all or a part of the joint portion 14 in the width direction orthogonal to the extending direction.
  • the contact portion 201 is located directly above the portion (joint portion 14) where the lid body 11 and the main body portion 12 are joined by welding or adhesion. Therefore, the contact portion 201 can effectively suppress damage such as cracking of the joint portion 14. As a result, the possibility of internal gas leakage or the like due to damage to the joint portion 14 is reduced. This contributes to the improvement of the safety of the power storage device 1.
  • the power storage device 1 includes a reinforcing member 100 which is arranged outside the wall portion 13 of the main body portion 12 and is fixed to the main body portion 12 and is separate from the regulation member 200.
  • the fixing portion 202 extends from the side of the lid 11 to a position beyond the central portion in the height direction (Z-axis direction), which is the alignment direction of the lid 11 and the main body 12, on the side of the main body 12. And is fixed to the reinforcing member 100.
  • the regulating member 200 and the reinforcing member 100 are separate bodies (separate members), the degree of freedom in the shape and size of the regulating member 200 is high. Therefore, the regulating member 200 can be made into a shape or size more suitable for the position regulation of the lid 11. Further, since the regulating member 200 is fixed to the reinforcing member 100, the regulating member 200 and the reinforcing member 100 are structurally placed in a relationship of improving the rigidity of each other. That is, by combining the regulating member 200 and the reinforcing member 100, a higher reinforcing effect on the entire exterior body 10 can be obtained. Further, since the fixing portion 202 is arranged in a relatively wide range in the height direction, it can also function as a member for protecting or reinforcing the wall portion 13 of the main body portion 12. These things contribute to the improvement of the safety of the power storage device.
  • three regulating members 200 are arranged so as to press each of the four sides of the lid 11 in the top view, but only one side of the lid 11 is pressed by one regulating member 200. You may.
  • the area or volume of the joint portion 14 is relatively small due to restrictions such as the shape of the main body portion 12 or the lid body 11, the joint force on one side of the four sides of the lid body 11 is weaker than the other.
  • one regulating member 200 may be arranged on the exterior body 10 so as to hold down only the one side. This reduces the possibility of problems such as damage to the joint portion 14 between the lid body 11 and the main body portion 12.
  • the regulation member 230 which is one of the three regulation members 200, is configured to hold down two adjacent sides of the lid 11 in the top view as shown in FIGS. 3 and 4. ing.
  • regulatory members 200 that are separate from each other may be arranged on each of these two sides. That is, the shape, number, and layout of the regulating members 200 are not limited to the shapes, numbers, and layouts shown in FIGS. 1 to 7.
  • a restricting member 200 having a shape in which the fixing portion 202 arranged on the outside of each of the two wall portions 13a and 13c (see FIG. 3) is connected on the bottom surface side of the main body portion 12 may be fixed to the exterior body 10. ..
  • one regulating member 200 that presses two opposite sides of the four sides of the lid 11 in the top view can be manufactured. Further, in the regulating member 200, a portion located outside the bottom surface of the main body portion 12 (a connecting portion of the two fixing portions 202) functions as a portion for restricting the upward movement of the two contact portions 201. do. Therefore, it is possible to obtain a higher effect of suppressing the swelling (deformation) of the lid 11 by the regulating member 200.
  • the fixing portion 202 By forming the fixing portion 202 in a rectangular ring shape when viewed from above, the fixing portion 202 is arranged so as to surround the outer surfaces of the four wall portions 13 (13a to 13d) of the main body portion 12, and the fixing portion 202 is a lid. It may have four contact portions 201 that press the four sides of the body 11. That is, one regulating member 200 having the same shape as the shape of the combination of the reinforcing member 100 and the three regulating members 200 according to the present embodiment (see FIG. 3) may be fixed to the exterior body 10. In other words, the regulating member 200 and the reinforcing member 100 do not have to be separate from each other. That is, one of the regulating member 200 and the reinforcing member 100 may be integrally provided on the other.
  • the power storage device 1 may have at least one regulating member 200, and the number of contact portions 201 possessed by one regulating member 200 may be one or more. Further, one contact portion 201 may be arranged so as to come into contact with the upper surface 11a of the lid body 11. That is, one contact portion 201 may be provided on the regulating member 200 so as to press at least a part of the upper surface 11a of the lid body 11.
  • Each of the reinforcing member 100 and the regulating member 200 does not have to be made of metal.
  • Each of the reinforcing member 100 and the regulating member 200 may be made of a highly rigid non-metallic material such as fiber reinforced plastic. As a result, the weight of the power storage device 1 can be reduced.
  • the power storage device 1 does not have to include the reinforcing member 100.
  • the power storage device 1 can be improved in safety by including at least the regulation member 200 as a member for suppressing the deformation or displacement of the lid 11.
  • the regulating member 200 is fixed by engaging, fitting, embedding, adhering, welding, fastening, or the like with the fixing portion 202 to the main body portion 12. It may be fixed to the main body 12.
  • the present invention can be applied to a power storage device provided with a power storage element 20 such as a lithium ion secondary battery.
  • Power storage device 10 Exterior body 11 Lid body 11a Top surface 12 Main body 13, 13a, 13b, 13c, 13d Wall 13e Rib 14 Joint 15 Opening 20 Power storage element 100 Reinforcing member 200, 210, 220, 230 Regulatory member 201, 211, 221 and 231 contact parts 202, 212, 222, 232 fixing parts

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  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

A power storage device 1 is provided with: an outer casing 10 that has a main body 12, which houses a power storage element 20, and that has a lid 11, which is joined integrally with an opening 15 in the main body 12 and which covers the opening 15; and a restricting member 200. The restricting member 200 has: a contact part 201 that contacts an upper surface 11a, which is the surface of the lid 11 on the reverse side from the main body 12, and that restricts movement of the lid 11 in a direction away from the opening 15; and a fixed part 202 that is fixed to the main body 12.

Description

蓄電装置Power storage device
　本発明は、蓄電素子及び蓄電素子を収容する外装体を備える蓄電装置に関する。 The present invention relates to a power storage device and a power storage device including an exterior body that houses the power storage element.
　特許文献１には、蓄電素子及び蓄電素子が収容された外装体を備える蓄電装置が開示されている。この蓄電装置では、外装体の外周壁に凹部が形成されており、凹部には、外装体の剛性を向上させるための補強部材が配置されている。 Patent Document 1 discloses a power storage device including a power storage element and an exterior body in which the power storage element is housed. In this power storage device, a recess is formed in the outer peripheral wall of the exterior body, and a reinforcing member for improving the rigidity of the exterior body is arranged in the recess.
特開２０１８－１９５３７８号公報JP-A-2018-195378
　上記従来の蓄電装置では、補強部材は、外装体の本体部の４つの側壁を取り囲むように無端状に設けられている。これにより、外装体の側壁の変形を抑制できる。しかし、外装体の内部の蓄電素子からガスが排出された場合、外装体の内部の圧力（内圧）が急激に上昇することで、外装体は内側から力（内圧）を受ける。この内圧は、外装体の本体部だけでなく、本体部の開口部を塞ぐ蓋体にも作用する。つまり、蓋体は、本体部から外れる方向の力を内側から受ける状態となる。これにより、蓋体と本体部との接合部に応力が集中しやすい状態となり、その結果、接合部に、割れ等の損傷が生じる可能性がある。また、蓋体が受ける内圧は、外装体の気密性が高いほど大きくなる。そのため、本体部の開口部における気密性を確保するために、開口部の周縁と蓋体とを溶着等で一体的に接合している場合に、蓋体が受ける内圧は高くなりやすく、その結果、蓋体と本体部との接合部に生じる曲げ応力または引張応力が大きくなりやすい。このような応力に起因して接合部に割れ等の損傷が生じた場合、外装体の予期せぬ位置から、外装体の内部のガスが漏れ出すことになり、このことは蓄電装置の安全性を低下させることがある。 In the above-mentioned conventional power storage device, the reinforcing member is provided in an endless shape so as to surround the four side walls of the main body of the exterior body. As a result, deformation of the side wall of the exterior body can be suppressed. However, when gas is discharged from the power storage element inside the exterior body, the pressure inside the exterior body (internal pressure) rises sharply, and the exterior body receives a force (internal pressure) from the inside. This internal pressure acts not only on the main body of the exterior body but also on the lid that closes the opening of the main body. That is, the lid body is in a state of receiving a force in the direction of detaching from the main body from the inside. As a result, stress tends to be concentrated on the joint between the lid and the main body, and as a result, damage such as cracks may occur in the joint. Further, the internal pressure received by the lid increases as the airtightness of the exterior increases. Therefore, in order to ensure airtightness at the opening of the main body, when the peripheral edge of the opening and the lid are integrally joined by welding or the like, the internal pressure received by the lid tends to be high, and as a result. , The bending stress or tensile stress generated at the joint between the lid and the main body tends to increase. When damage such as cracks occurs in the joint due to such stress, the gas inside the exterior body leaks from an unexpected position of the exterior body, which is the safety of the power storage device. May decrease.
　本発明は、本願発明者が上記課題に新たに着目することによってなされたものであり、安全性が向上された蓄電装置を提供することを目的とする。 The present invention has been made by the inventor of the present application paying new attention to the above problems, and an object of the present invention is to provide a power storage device with improved safety.
　本発明の一態様に係る蓄電装置は、蓄電素子を収容する本体部、及び、前記本体部の開口部に一体的に接合されている状態で前記開口部を塞ぐ蓋体を有する外装体と、前記蓋体の、前記本体部とは反対側の面である上面に当接することで、前記蓋体の前記開口部から離れる方向の移動を規制する当接部と前記本体部に固定された固定部とを有する規制部材と、を備える。 The power storage device according to one aspect of the present invention includes a main body for accommodating a power storage element, and an exterior body having a lid that closes the opening while being integrally joined to the opening of the main body. A contact portion that regulates the movement of the lid body in a direction away from the opening by abutting on the upper surface of the lid body that is a surface opposite to the main body portion, and a fixing fixed to the main body portion. It is provided with a regulating member having a portion.
　本発明によれば、安全性が向上された蓄電装置を提供することができる。 According to the present invention, it is possible to provide a power storage device with improved safety.
図１は、実施の形態に係る蓄電装置の外観を示す斜視図である。FIG. 1 is a perspective view showing the appearance of the power storage device according to the embodiment. 図２は、実施の形態に係る蓄電装置の分解斜視図である。FIG. 2 is an exploded perspective view of the power storage device according to the embodiment. 図３は、実施の形態に係る規制部材及びその周辺の構成を示す斜視図である。FIG. 3 is a perspective view showing the configuration of the regulatory member and its surroundings according to the embodiment. 図４は、実施の形態に係る蓄電素子の平面図である。FIG. 4 is a plan view of the power storage element according to the embodiment. 図５は、実施の形態に係る規制部材と外装体との構造上の関係を示す第１の断面図である。FIG. 5 is a first cross-sectional view showing the structural relationship between the regulatory member and the exterior body according to the embodiment. 図６は、実施の形態に係る規制部材と外装体との構造上の関係を示す第２の断面図である。FIG. 6 is a second cross-sectional view showing the structural relationship between the regulatory member and the exterior body according to the embodiment. 図７は、実施の形態に係る規制部材と接合部との位置関係を示す模式図である。FIG. 7 is a schematic view showing the positional relationship between the regulating member and the joint portion according to the embodiment.
　本発明の一態様に係る蓄電装置は、蓄電素子を収容する本体部、及び、前記本体部の開口部に一体的に接合されている状態で前記開口部を塞ぐ蓋体を有する外装体と、前記蓋体の、前記本体部とは反対側の面である上面に当接することで、前記蓋体の前記開口部から離れる方向の移動を規制する当接部と前記本体部に固定された固定部とを有する規制部材と、を備える。 The power storage device according to one aspect of the present invention includes a main body for accommodating a power storage element, and an exterior body having a lid that closes the opening while being integrally joined to the opening of the main body. A contact portion that regulates the movement of the lid body in a direction away from the opening by abutting on the upper surface of the lid body that is a surface opposite to the main body portion, and a fixing fixed to the main body portion. It is provided with a regulating member having a portion.
　この構成によれば、蓋体が本体部の開口部に一体的に接合されていることで、外装体は、開口部の位置において高い気密性を確保することができる。この場合、蓄電素子からガスが排出されたとき、外装体の内圧は急激に上昇し、その結果、蓋体は、本体部か外される方向に作用する大きい内圧を受けることになる。しかしながら、本態様に係る蓄電装置では、外装体の内圧が上昇することで、蓋体に膨張または移動などの変形または変位が生じようとした場合、その上面に規制部材の当接部が当接することで、蓋体の変形または変位を抑制することができる。さらに、規制部材は、固定部において本体部に固定されているため、当接部による蓋体のはずれ止め部材または変形抑制部材としての実効性が確保される。このように、本態様に係る蓄電装置によれば、安全性を向上させることができる。 According to this configuration, the lid body is integrally joined to the opening of the main body, so that the exterior body can ensure high airtightness at the position of the opening. In this case, when the gas is discharged from the power storage element, the internal pressure of the exterior body rises sharply, and as a result, the lid body receives a large internal pressure acting in the direction of being removed from the main body portion. However, in the power storage device according to this aspect, when the internal pressure of the exterior body rises and the lid body is about to be deformed or displaced such as expanding or moving, the contact portion of the regulating member comes into contact with the upper surface thereof. As a result, deformation or displacement of the lid can be suppressed. Further, since the regulating member is fixed to the main body portion at the fixing portion, the effectiveness as a detachment prevention member or deformation suppressing member of the lid body by the contact portion is ensured. As described above, according to the power storage device according to this aspect, safety can be improved.
　前記本体部には、第一方向に並んで配置された複数の前記蓄電素子が収容されており、前記規制部材の前記当接部は、前記蓋体の上面視において、前記蓋体の前記第一方向の端縁部の、前記第一方向と交差する第二方向における中央部に配置されている、としてもよい。 A plurality of the power storage elements arranged side by side in the first direction are housed in the main body portion, and the contact portion of the regulating member is the first portion of the lid body in a top view of the lid body. It may be arranged at the center of the edge portion in one direction in the second direction intersecting the first direction.
　この構成によれば、蓋体の第一方向の端縁部（第二方向に延在する端縁部）において最も膨らみやすい第二方向の中央部に、当接部が当接するよう配置されている。そのため、蓋体の膨らみ（変形）をより効率よく抑制することができる。このことは、蓄電装置の安全性の向上に寄与する。 According to this configuration, the contact portion is arranged so as to come into contact with the central portion in the second direction, which is most likely to swell at the edge portion in the first direction (the edge portion extending in the second direction) of the lid body. There is. Therefore, the swelling (deformation) of the lid can be suppressed more efficiently. This contributes to the improvement of the safety of the power storage device.
　前記固定部は、前記本体部の側方において、前記蓋体と前記本体部との並び方向である第三方向における前記本体部の中央部を越える位置まで延設されている、としてもよい。 The fixing portion may be extended to a position beyond the central portion of the main body portion in the third direction, which is the alignment direction of the lid body and the main body portion, on the side of the main body portion.
　この構成によれば、固定部は、第三方向における比較的に広い範囲に配置されていることで、本体部の壁部を保護または補強する部材としても機能することができる。このことも蓄電装置の安全性の向上に寄与する。 According to this configuration, the fixed portion can also function as a member for protecting or reinforcing the wall portion of the main body portion by being arranged in a relatively wide range in the third direction. This also contributes to the improvement of the safety of the power storage device.
　前記蓄電装置はさらに、前記本体部の壁部の外側に配置され、前記本体部に固定された補強部材を備え、前記固定部は前記補強部材に固定されている、としてもよい。 The power storage device may be further arranged outside the wall portion of the main body portion, provided with a reinforcing member fixed to the main body portion, and the fixed portion may be fixed to the reinforcing member.
　この構成によれば、補強部材が壁部の膨らみを抑制するとともに、規制部材が蓋体の変形または変位を抑制することができる。つまり、規制部材と補強部材との組み合わせにより、外装体の全体に対するより高い補強効果を得ることができる。これにより、蓄電装置の安全性をさらに向上させることができる。規制部材は直接的には補強部材に固定されるため、溶接または締結などの作業が容易である。 According to this configuration, the reinforcing member can suppress the swelling of the wall portion, and the regulating member can suppress the deformation or displacement of the lid body. That is, by combining the regulating member and the reinforcing member, a higher reinforcing effect on the entire exterior body can be obtained. Thereby, the safety of the power storage device can be further improved. Since the regulating member is directly fixed to the reinforcing member, operations such as welding or fastening are easy.
　前記蓋体と前記本体部とは、前記開口部の周縁に位置する接合部において接合されており、前記蓋板の前記上面視における前記当接部の配置領域の少なくとも一部は、前記接合部と重なっている、としてもよい。 The lid body and the main body portion are joined at a joint portion located on the peripheral edge of the opening, and at least a part of the arrangement region of the contact portion in the top view of the lid plate is the joint portion. It may overlap with.
　この構成によれば、蓋体と本体部とが溶着または接着等によって接合された部分の直上に当接部が位置するため、当接部は、当該接合部の割れ等の損傷を効果的に抑制することができる。そのため、接合部が損傷することによる内部のガス漏れ等の発生可能性が低減される。このことは、蓄電装置の安全性の向上に寄与する。 According to this configuration, since the abutting portion is located directly above the portion where the lid body and the main body portion are joined by welding or adhesion, the abutting portion effectively damages the joint portion such as cracks. It can be suppressed. Therefore, the possibility of internal gas leakage or the like due to damage to the joint is reduced. This contributes to the improvement of the safety of the power storage device.
　蓄電装置はさらに、前記本体部の壁部の外側に配置され、前記本体部に固定された、前記規制部材とは別体の補強部材とを備え、前記固定部は、前記本体部の側方において、前記蓋体と前記本体部との並び方向における前記本体部の中央部を越える位置まで延設されており、かつ、前記補強部材に固定されている、としてもよい。 The power storage device is further provided with a reinforcing member that is arranged outside the wall portion of the main body portion and is fixed to the main body portion and is separate from the regulating member, and the fixing portion is lateral to the main body portion. In the above, it may be extended to a position beyond the central portion of the main body portion in the alignment direction of the lid body and the main body portion, and may be fixed to the reinforcing member.
　この構成によれば、規制部材と補強部材とは互いに別体（別部材）であるため、規制部材の形状及び大きさ等の自由度が高いため、規制部材を、蓋体の位置規制により適した形状または大きさにすることができる。規制部材は、補強部材に固定されていることで、構造上、規制部材と補強部材とは互いの剛性を向上させる関係に置かれる。つまり、規制部材と補強部材との組み合わせにより、外装体の全体に対する補強効果を得ることができる。さらに、固定部が、高さ方向における比較的に広い範囲に配置されるため、本体部の壁部を保護または補強する部材としても機能することができる。これらのことは蓄電装置の安全性の向上に寄与する。 According to this configuration, since the regulating member and the reinforcing member are separate bodies (separate members) from each other, the degree of freedom in the shape and size of the regulating member is high, so that the regulating member is more suitable for the position regulation of the lid. Can be shaped or sized. Since the regulating member is fixed to the reinforcing member, the regulating member and the reinforcing member are structurally placed in a relationship of improving mutual rigidity. That is, the combination of the regulating member and the reinforcing member can obtain a reinforcing effect on the entire exterior body. Further, since the fixing portion is arranged in a relatively wide range in the height direction, it can also function as a member for protecting or reinforcing the wall portion of the main body portion. These things contribute to the improvement of the safety of the power storage device.
　以下、図面を参照しながら、本発明の実施の形態（その変形例を含む）に係る蓄電装置について説明する。以下で説明する実施の形態は、いずれも包括的または具体的な例を示すものである。以下の実施の形態で示される数値、形状、材料、構成要素、構成要素の配置位置及び接続形態などは、一例であり、本発明を限定する主旨ではない。各図において、寸法等は厳密に図示したものではない。 Hereinafter, the power storage device according to the embodiment of the present invention (including a modification thereof) will be described with reference to the drawings. Each of the embodiments described below provides a comprehensive or specific example. Numerical values, shapes, materials, components, arrangement positions of components, connection forms, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. In each figure, the dimensions and the like are not strictly illustrated.
　以下の説明及び図面中において、複数の蓄電素子の並び方向、蓄電素子の容器の長側面の対向方向、または、当該容器の厚さ方向をＸ軸方向と定義する。１つの蓄電素子における電極端子の並び方向、または、蓄電素子の容器の短側面の対向方向をＹ軸方向と定義する。蓄電装置の外装体における本体部と蓋体との並び方向、蓄電素子とバスバーとの並び方向、または、上下方向をＺ軸方向と定義する。これらＸ軸方向、Ｙ軸方向及びＺ軸方向は、互いに交差（以下実施の形態及びその変形例では、直交）する方向である。使用態様によってはＺ軸方向が上下方向にならない場合も考えられるが、以下では説明の便宜のため、Ｚ軸方向を上下方向として説明する。 In the following description and drawings, the direction in which a plurality of power storage elements are arranged, the direction in which the long side surfaces of the power storage elements face each other, or the thickness direction of the container is defined as the X-axis direction. The direction in which the electrode terminals are arranged in one power storage element or the direction opposite to the short side surface of the container of the power storage element is defined as the Y-axis direction. The Z-axis direction is defined as the alignment direction of the main body and the lid, the alignment direction of the storage element and the bus bar, or the vertical direction in the exterior body of the power storage device. These X-axis directions, Y-axis directions, and Z-axis directions intersect each other (hereinafter, orthogonal to each other in the embodiment and its modifications). Depending on the usage mode, the Z-axis direction may not be the vertical direction, but for convenience of explanation, the Z-axis direction will be described below as the vertical direction.
　以下では、Ｘ軸方向を第一方向と呼び、Ｙ軸方向を第二方向と呼ぶ場合がある。さらに、Ｚ軸方向を、第三方向または高さ方向と呼ぶ場合がある。以下の実施の形態において、平行及び直交などの、相対的な方向または姿勢を示す表現が用いられる場合があるが、これらの表現は、厳密には、その方向または姿勢ではない場合も含む。２つの方向が平行である、とは、当該２つの方向が完全に平行であることを意味するだけでなく、実質的に平行であること、すなわち、数％程度の差異を含むことも意味する。以下の説明において、Ｘ軸方向プラス側とは、Ｘ軸の矢印方向側を示し、Ｘ軸方向マイナス側とは、Ｘ軸方向プラス側とは反対側を示す。Ｙ軸方向及びＺ軸方向についても同様である。 In the following, the X-axis direction may be referred to as the first direction, and the Y-axis direction may be referred to as the second direction. Further, the Z-axis direction may be referred to as a third direction or a height direction. In the following embodiments, expressions indicating relative directions or postures such as parallel and orthogonal may be used, but these expressions also include cases where they are not strictly the directions or postures. The fact that the two directions are parallel not only means that the two directions are completely parallel, but also that they are substantially parallel, that is, that they include a difference of about several percent. .. In the following description, the plus side in the X-axis direction indicates the arrow direction side of the X-axis, and the minus side in the X-axis direction indicates the side opposite to the plus side in the X-axis direction. The same applies to the Y-axis direction and the Z-axis direction.
　（実施の形態）
　［１．蓄電装置の全般的な説明］
　まず、図１及び図２を用いて、実施の形態に係る蓄電装置１の全般的な説明を行う。図１は、実施の形態に係る蓄電装置１の外観を示す斜視図である。図２は、実施の形態に係る蓄電装置１の分解斜視図である。 (Embodiment)
[1. General description of power storage device]
First, with reference to FIGS. 1 and 2, a general description of the power storage device 1 according to the embodiment will be given. FIG. 1 is a perspective view showing the appearance of the power storage device 1 according to the embodiment. FIG. 2 is an exploded perspective view of the power storage device 1 according to the embodiment.
　蓄電装置１は、外部からの電気を充電し、また外部へ電気を放電することができる装置であり、本実施の形態では、略直方体形状を有している。蓄電装置１は、電力貯蔵用途または電源用途等に使用される電池モジュール（組電池）であってもよい。具体的には、蓄電装置１は、自動車、自動二輪車、ウォータークラフト、船舶、スノーモービル、農業機械、建設機械、または、電気鉄道用の鉄道車両等の移動体の駆動用またはエンジン始動用等のバッテリ等として用いられてもよい。上記の自動車としては、電気自動車（ＥＶ）、ハイブリッド電気自動車（ＨＥＶ）、プラグインハイブリッド電気自動車（ＰＨＥＶ）及びガソリン自動車が例示される。上記の電気鉄道用の鉄道車両としては、電車、モノレール及びリニアモーターカーが例示される。蓄電装置１は、家庭用または発電機用等に使用される定置用のバッテリ等としても用いることができる。 The power storage device 1 is a device capable of charging electricity from the outside and discharging electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment. The power storage device 1 may be a battery module (assembled battery) used for power storage or power supply. Specifically, the power storage device 1 is used for driving a moving body such as an automobile, a motorcycle, a watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, or a railroad vehicle for an electric railway, or for starting an engine. It may be used as a battery or the like. Examples of the above-mentioned vehicle include an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and a gasoline vehicle. Examples of the railway vehicle for the electric railway include a train, a monorail, and a linear motor car. The power storage device 1 can also be used as a stationary battery or the like used for home use, a generator, or the like.
　図１及び図２に示すように、蓄電装置１は、複数の蓄電素子２０と、複数の蓄電素子２０を収容する外装体１０と、外装体１０に取り付けられた補強部材１００とを備える。本実施の形態では、外装体１０には８個の蓄電素子２０が収容されている。蓄電装置１が備える蓄電素子２０の数は８には限定されない。蓄電装置１は、１以上の蓄電素子２０を備えればよい。本実施の形態では、Ｘ軸方向に並べられた複数の蓄電素子２０により１つの蓄電素子列２４が形成されている。蓄電素子列２４は、図示しないスペーサ及び絶縁フィルム等を有してもよい。 As shown in FIGS. 1 and 2, the power storage device 1 includes a plurality of power storage elements 20, an exterior body 10 accommodating the plurality of power storage elements 20, and a reinforcing member 100 attached to the exterior body 10. In the present embodiment, eight power storage elements 20 are housed in the exterior body 10. The number of power storage elements 20 included in the power storage device 1 is not limited to eight. The power storage device 1 may include one or more power storage elements 20. In the present embodiment, one power storage element row 24 is formed by a plurality of power storage elements 20 arranged in the X-axis direction. The power storage element row 24 may have a spacer, an insulating film, or the like (not shown).
　外装体１０は、蓄電素子列２４を収容する本体部１２と蓋体１１とを有し、本体部１２に収容された蓄電素子列２４と蓋体１１との間にはバスバープレート１７が配置されている。バスバープレート１７には複数のバスバー３３が保持されており、複数のバスバー３３はバスバーカバー７０及び７５に覆われている。バスバープレート１７と蓋体１１との間には、制御回路等を含む接続ユニット８０が配置されている。 The exterior body 10 has a main body 12 and a lid 11 for accommodating the power storage element row 24, and a bus bar plate 17 is arranged between the power storage element row 24 and the lid 11 housed in the main body 12. ing. A plurality of bus bars 33 are held on the bus bar plate 17, and the plurality of bus bars 33 are covered with the bus bar covers 70 and 75. A connection unit 80 including a control circuit and the like is arranged between the bus bar plate 17 and the lid 11.
　外装体１０は、蓄電装置１の外殻を構成する矩形状（箱状）の容器（モジュールケース）である。つまり、外装体１０は、蓄電素子列２４及びバスバープレート１７等を所定の位置に固定し、これらを衝撃などから保護する部材である。外装体１０は、例えば、ポリカーボネート（ＰＣ）、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）、ポリスチレン（ＰＳ）、ポリフェニレンサルファイド樹脂（ＰＰＳ）、ポリフェニレンエーテル（ＰＰＥ（変性ＰＰＥを含む））、ポリエチレンテレフタラート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、テトラフルオロエチレン・パーフルオロアルキルビニルエーテル（ＰＦＡ）、ポリテトラフルオロエチレン（ＰＴＦＥ）、ポリエーテルサルフォン（ＰＥＳ）、ＡＢＳ樹脂、もしくは、それらの複合材料等の絶縁部材、または、絶縁塗装をした金属等により形成されている。 The exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the outer shell of the power storage device 1. That is, the exterior body 10 is a member that fixes the power storage element row 24, the bus bar plate 17, and the like at predetermined positions, and protects them from impacts and the like. The exterior body 10 includes, for example, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (including modified PPE). PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene / perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone (PES), ABS resin, or , It is formed of an insulating member such as a composite material thereof, or an insulating coated metal or the like.
　外装体１０が有する蓋体１１は、本体部１２の開口部１５を閉塞する矩形状の部材であり、正極側の外部端子９１及び負極側の外部端子９２を有している。外部端子９１及び９２は、接続ユニット８０及びバスバー３３を介して複数の蓄電素子２０と電気的に接続されており、蓄電装置１は、この外部端子９１及び９２を介して、外部からの電気を充電し、また外部へ電気を放電する。外部端子９１及び９２は、例えば、アルミニウム、アルミニウム合金等の金属製の導電部材で形成されている。 The lid 11 of the exterior body 10 is a rectangular member that closes the opening 15 of the main body 12, and has an external terminal 91 on the positive electrode side and an external terminal 92 on the negative electrode side. The external terminals 91 and 92 are electrically connected to a plurality of power storage elements 20 via the connection unit 80 and the bus bar 33, and the power storage device 1 receives electricity from the outside via the external terminals 91 and 92. It charges and discharges electricity to the outside. The external terminals 91 and 92 are formed of, for example, a conductive member made of metal such as aluminum or an aluminum alloy.
　蓋体１１には、外装体１０の内部及び外部の一方から他方に移動する気体が通過する通気室（図示せず）と、通気室の内部と外装体１０の外部とを連通する排気管９０とが設けられている。外装体１０の内部のガスは、通気室及び排気管９０を介して、外装体１０の外部に放出される。より詳細には、通気室には、外装体１０の内部の圧力（内圧）が所定の値まで上昇した場合に開放される弁部材が配置されている。従って、通常時において、水または塵芥などの異物が排気管９０を介して通気室に流入した場合であっても、弁部材により、異物の外装体１０の内部への流入は実質的に防止される。また、蓄電素子２０からガスが排出されることで外装体１０の内圧が所定の値以上になった場合、弁部材が開放状態となり、外装体１０の内部のガスは、通気室を介して排気管９０から外装体１０の外部に放出される。 The lid 11 has a ventilation chamber (not shown) through which gas moving from one of the inside and outside of the exterior body 10 passes, and an exhaust pipe 90 communicating the inside of the ventilation chamber and the outside of the exterior body 10. And are provided. The gas inside the exterior body 10 is discharged to the outside of the exterior body 10 through the ventilation chamber and the exhaust pipe 90. More specifically, in the ventilation chamber, a valve member that is opened when the internal pressure (internal pressure) of the exterior body 10 rises to a predetermined value is arranged. Therefore, even when foreign matter such as water or dust flows into the ventilation chamber through the exhaust pipe 90 in a normal state, the valve member substantially prevents the foreign matter from flowing into the exterior body 10. NS. Further, when the internal pressure of the exterior body 10 becomes equal to or higher than a predetermined value due to the gas being discharged from the power storage element 20, the valve member is opened and the gas inside the exterior body 10 is exhausted through the ventilation chamber. It is discharged from the pipe 90 to the outside of the exterior body 10.
　外装体１０が有する本体部１２は、蓄電素子列２４を収容するための開口部１５が形成された有底矩形筒状のハウジング（筐体）である。開口部１５が、蓋体１１に塞がれた状態で、開口部１５の周縁と蓋体１１とが、例えば熱溶着によって接合される。これにより、開口部１５における気密性が確保される。 The main body 12 of the exterior body 10 is a bottomed rectangular cylindrical housing (housing) in which an opening 15 for accommodating the power storage element row 24 is formed. With the opening 15 closed by the lid 11, the peripheral edge of the opening 15 and the lid 11 are joined, for example, by heat welding. As a result, the airtightness at the opening 15 is ensured.
　蓄電素子２０は、電気を充電し、また、電気を放電することのできる二次電池（単電池）であり、より具体的には、リチウムイオン二次電池などの非水電解質二次電池である。蓄電素子２０は、扁平な直方体（角形）の形状を有しており、本実施の形態では、上述のように、８個の蓄電素子２０がＸ軸方向に配列されている。 The power storage element 20 is a secondary battery (cell battery) capable of charging electricity and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. .. The power storage element 20 has a flat rectangular parallelepiped (square) shape, and in the present embodiment, as described above, eight power storage elements 20 are arranged in the X-axis direction.
　本実施の形態では、蓄電素子２０は、金属製の容器２１を備える。容器２１は、互いに対向する一対の長側面２１ａと、互いに対向する一対の短側面２１ｂとを有する角形のケースである。容器２１の内部には、電極体、集電体、及び電解液等が収容されている。本実施の形態では、複数の蓄電素子２０のそれぞれは長側面２１ａがＸ軸方向に向く姿勢（短側面２１ｂがＸ軸方向に平行な姿勢）で、Ｘ軸方向に一列に並べられている。 In the present embodiment, the power storage element 20 includes a metal container 21. The container 21 is a square case having a pair of long side surfaces 21a facing each other and a pair of short side surfaces 21b facing each other. An electrode body, a current collector, an electrolytic solution, and the like are housed inside the container 21. In the present embodiment, each of the plurality of power storage elements 20 is arranged in a row in the X-axis direction in a posture in which the long side surface 21a faces the X-axis direction (the short side surface 21b is in a posture parallel to the X-axis direction).
　容器２１の蓋板２１ｃには、容器２１の内部の電極体と電気的に接続された金属製の電極端子２２（正極端子及び負極端子）が設けられている。容器２１の蓋板２１ｃにはさらに、容器２１の内部のガスを外部に排出するためのガス排出弁２３が設けられている。ガス排出弁２３は、容器２１の内部の電解液が気化することで容器２１の内圧が上昇した場合に、開放すること（開弁すること）で、容器２１の内部のガスを容器２１の外部に排出する機能を有する。このような機能を有するガス排出弁２３は、複数の蓄電素子２０のそれぞれに設けられている。本実施の形態では、図２に示すように、複数の蓄電素子２０のそれぞれは、ガス排出弁２３がＺ軸方向プラス側に向く姿勢で配置されている。 The lid plate 21c of the container 21 is provided with metal electrode terminals 22 (positive electrode terminal and negative electrode terminal) electrically connected to the electrode body inside the container 21. The lid plate 21c of the container 21 is further provided with a gas discharge valve 23 for discharging the gas inside the container 21 to the outside. The gas discharge valve 23 opens (opens) the gas inside the container 21 when the internal pressure of the container 21 rises due to vaporization of the electrolytic solution inside the container 21 to release the gas inside the container 21 to the outside of the container 21. Has the function of discharging to. The gas discharge valve 23 having such a function is provided in each of the plurality of power storage elements 20. In the present embodiment, as shown in FIG. 2, each of the plurality of power storage elements 20 is arranged in a posture in which the gas discharge valve 23 faces the positive side in the Z-axis direction.
　蓄電素子２０は、非水電解質二次電池には限定されず、非水電解質二次電池以外の二次電池であってもよいし、キャパシタであってもよい。また、蓄電素子２０は、使用者が充電をしなくても蓄えられている電気を使用できる一次電池であってもよい。また、本実施の形態では、直方体形状（角形）の蓄電素子２０を図示しているが、蓄電素子２０の形状は、直方体形状には限定されず、直方体形状以外の多角柱形状、円柱形状、長円柱形状等であってもよい。さらに、ラミネート型の蓄電素子が、蓄電素子２０として蓄電装置１に備えられてもよい。 The power storage element 20 is not limited to the non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery, or may be a capacitor. Further, the power storage element 20 may be a primary battery that can use the stored electricity without the user having to charge the battery. Further, in the present embodiment, the rectangular parallelepiped shape (square) power storage element 20 is illustrated, but the shape of the power storage element 20 is not limited to the rectangular parallelepiped shape, and a polygonal column shape other than the rectangular parallelepiped shape, a cylindrical shape, and the like. It may have a long cylindrical shape or the like. Further, a laminated type power storage element may be provided in the power storage device 1 as the power storage element 20.
　バスバー３３は、バスバープレート１７に保持された状態で、少なくとも２つの蓄電素子２０上に配置され、当該少なくとも２つの蓄電素子２０の電極端子２２同士を電気的に接続する矩形状の板状部材である。バスバー３３の材質は特に限定されず、アルミニウム、アルミニウム合金、銅、銅合金、ステンレス鋼等の金属若しくはそれらの組み合わせ、または、金属以外の導電性の部材で形成されていてもよい。本実施の形態では、５つのバスバー３３を用いて、蓄電素子２０を２個ずつ並列に接続して４セットの蓄電素子群を構成し、かつ、当該４セットの蓄電素子群を直列に接続している。また、８個の蓄電素子２０の電気的な接続の態様に特に限定はなく、８個の蓄電素子２０の全てが、７個のバスバーによって直列に接続されてもよい。 The bus bar 33 is a rectangular plate-shaped member that is arranged on at least two power storage elements 20 while being held by the bus bar plate 17 and electrically connects the electrode terminals 22 of the at least two power storage elements 20 to each other. be. The material of the bus bar 33 is not particularly limited, and may be formed of a metal such as aluminum, aluminum alloy, copper, copper alloy, stainless steel or a combination thereof, or a conductive member other than metal. In the present embodiment, five bus bars 33 are used to connect two power storage elements 20 in parallel to form four sets of power storage element groups, and to connect the four sets of power storage element groups in series. ing. Further, the mode of electrical connection of the eight power storage elements 20 is not particularly limited, and all of the eight power storage elements 20 may be connected in series by the seven bus bars.
　接続ユニット８０は、複数のバスバー及び制御基板等を有するユニットであり、蓄電素子列２４と、外部端子９１及び９２とを電気的に接続する。接続ユニット８０が有する制御基板は複数の電気部品を有し、これら複数の電気部品により、各蓄電素子２０の状態を検出する検出回路、及び、充電及び放電を制御する制御回路等が形成されている。本実施の形態では、接続ユニット８０は、バスバープレート１７に固定されている。 The connection unit 80 is a unit having a plurality of bus bars, a control board, and the like, and electrically connects the power storage element row 24 and the external terminals 91 and 92. The control board included in the connection unit 80 has a plurality of electric components, and these plurality of electric components form a detection circuit for detecting the state of each power storage element 20, a control circuit for controlling charging and discharging, and the like. There is. In this embodiment, the connection unit 80 is fixed to the bus bar plate 17.
　バスバープレート１７は、バスバー３３を保持する樹脂製の部材である。本実施の形態では、バスバープレート１７は、複数のバスバー３３、接続ユニット８０、及び、その他配線類等（図示せず）を保持し、これら部材の位置規制等を行う部材である。また、バスバープレート１７には、複数のバスバー３３のそれぞれを保持し、かつ、複数のバスバー３３それぞれの一部を複数の蓄電素子２０の側に露出させるバスバー用開口部１７ａが複数設けられている。 The bus bar plate 17 is a resin member that holds the bus bar 33. In the present embodiment, the bus bar plate 17 is a member that holds a plurality of bus bars 33, a connection unit 80, and other wirings (not shown), and regulates the positions of these members. Further, the bus bar plate 17 is provided with a plurality of bus bar openings 17a that hold each of the plurality of bus bars 33 and expose a part of each of the plurality of bus bars 33 to the side of the plurality of power storage elements 20. ..
　バスバープレート１７のＹ軸方向の中央には、複数の蓄電素子２０のガス排出弁２３の配列に沿って、Ｘ軸方向に延びるとともにＺ軸方向プラス側に突出する経路形成部１９が設けられている。経路形成部１９は全てのガス排出弁２３をＺ軸方向プラス側から覆っている。経路形成部１９の長手方向の端部には、図２に示すようにＸ軸方向プラス側及びＸ軸方向マイナス側の両方にそれぞれ経路出口１８が設けられている。そのため、蓄電素子２０から排出されたガスは、主として経路出口１８を通過して、上述の通気室及び排気管９０を介して外装体１０の外部に放出される。このように構成されたバスバープレート１７は、外装体１０の本体部１２に、接着または熱溶着等の所定の手法により固定されている。 At the center of the bus bar plate 17 in the Y-axis direction, a path forming portion 19 extending in the X-axis direction and projecting to the plus side in the Z-axis direction is provided along the arrangement of the gas discharge valves 23 of the plurality of power storage elements 20. There is. The path forming portion 19 covers all the gas discharge valves 23 from the positive side in the Z-axis direction. As shown in FIG. 2, at the end of the path forming portion 19 in the longitudinal direction, path outlets 18 are provided on both the plus side in the X-axis direction and the minus side in the X-axis direction, respectively. Therefore, the gas discharged from the power storage element 20 mainly passes through the path outlet 18, and is discharged to the outside of the exterior body 10 through the above-mentioned ventilation chamber and exhaust pipe 90. The bus bar plate 17 configured in this way is fixed to the main body 12 of the exterior body 10 by a predetermined method such as adhesion or heat welding.
　バスバーカバー７０及び７５のそれぞれは、複数のバスバー３３を上方から覆う樹脂製の部材であり、複数のバスバー３３と接続ユニット８０とを電気的に絶縁する役割を担っている。 Each of the bus bar covers 70 and 75 is a resin member that covers the plurality of bus bars 33 from above, and plays a role of electrically insulating the plurality of bus bars 33 and the connection unit 80.
　補強部材１００は、外装体１０を補強する部材である。本実施の形態では、補強部材１００は、外装体１０を囲むように配置されており、外装体１０が内圧の上昇によって膨張しようとする場合、その膨張を抑制することができる。 The reinforcing member 100 is a member that reinforces the exterior body 10. In the present embodiment, the reinforcing member 100 is arranged so as to surround the exterior body 10, and when the exterior body 10 tries to expand due to an increase in internal pressure, the expansion can be suppressed.
　蓄電装置１はさらに、外装体１０の本体部１２に固定された規制部材２００を備えている。本実施の形態では、図１及び図２に示すように、補強部材１００を介して複数の規制部材２００が本体部１２に固定されており、これら規制部材２００は、主として蓋体１１を押さえる役目を有する。規制部材２００は、当接部２０１と固定部２０２とを有している。本実施の形態では、３つの規制部材２００が補強部材１００に固定されており、これら３つの規制部材２００を区別するために、図２に示すように、互いに異なる符号（２１０、２２０、２３０）を付している。以降の説明において、「規制部材２００」及びその構成要素（当接部２０１、固定部２０２）について説明する事項は、規制部材２１０、２２０、及び２３０のそれぞれに適用される。以下、規制部材２００及びその周辺の構成について、さらに図３～図７を参照しながら説明する。 The power storage device 1 further includes a regulation member 200 fixed to the main body 12 of the exterior body 10. In the present embodiment, as shown in FIGS. 1 and 2, a plurality of regulating members 200 are fixed to the main body portion 12 via the reinforcing member 100, and these regulating members 200 mainly serve to hold down the lid body 11. Has. The regulating member 200 has a contact portion 201 and a fixing portion 202. In the present embodiment, three regulating members 200 are fixed to the reinforcing member 100, and in order to distinguish these three regulating members 200, different reference numerals (210, 220, 230) are used as shown in FIG. Is attached. In the following description, the matters describing the "regulatory member 200" and its components (contact portion 201, fixing portion 202) are applied to the regulating members 210, 220, and 230, respectively. Hereinafter, the configuration of the regulating member 200 and its surroundings will be described with reference to FIGS. 3 to 7.
　［２．規制部材及びその周辺の構成］
　図３は、実施の形態に係る規制部材２００及びその周辺の構成を示す斜視図である。図３では、外装体１０から、補強部材１００及び規制部材２００並びにスペーサ１５１及び１５２を分離した状態が図示されている。図４は、実施の形態に係る蓄電装置１の平面図（Ｚ軸方向プラス側から見た図）である。図５は、実施の形態に係る規制部材２００と外装体１０との構造上の関係を示す第１の断面図である。図５では、図４のＶ－Ｖ断面におけるＹ軸方向マイナス側の端部が図示されている。図６は、実施の形態に係る規制部材２００と外装体１０との構造上の関係を示す第２の断面図である。図６では、図４のＶＩ－ＶＩ断面におけるＸ軸方向マイナス側の端部が図示されている。図７は、実施の形態に係る規制部材２００と接合部１４との位置関係を示す模式図である。 [2. Regulatory members and their surroundings]
FIG. 3 is a perspective view showing the configuration of the regulating member 200 and its surroundings according to the embodiment. FIG. 3 shows a state in which the reinforcing member 100, the regulating member 200, and the spacers 151 and 152 are separated from the exterior body 10. FIG. 4 is a plan view (viewed from the plus side in the Z-axis direction) of the power storage device 1 according to the embodiment. FIG. 5 is a first cross-sectional view showing the structural relationship between the regulating member 200 and the exterior body 10 according to the embodiment. In FIG. 5, the end portion on the minus side in the Y-axis direction in the VV cross section of FIG. 4 is shown. FIG. 6 is a second cross-sectional view showing the structural relationship between the regulating member 200 and the exterior body 10 according to the embodiment. In FIG. 6, the end portion on the minus side in the X-axis direction in the VI-VI cross section of FIG. 4 is shown. FIG. 7 is a schematic view showing the positional relationship between the regulating member 200 and the joint portion 14 according to the embodiment.
　上述の図２、及び、図３～図６に示すように、規制部材２００は、蓋体１１の、本体部１２とは反対側の面である上面１１ａに当接する当接部２０１と、本体部１２に固定された固定部２０２とを有している。当接部２０１は、上面１１ａに当接することで、蓋体１１の開口部１５（図２参照）から離れる向きの移動を規制する。規制部材２００は、鉄またはアルミニウム合金等の金属で形成されている。本実施の形態では、蓄電装置１は、図２及び図３に示すように、３つの規制部材２００（２１０、２２０、及び２３０）が備えられている。つまり、規制部材２１０は、当接部２１１と固定部２１２とを有し、規制部材２２０は、当接部２２１と固定部２２２とを有し、規制部材２３０は、当接部２３１と固定部２３２とを有する。３つの規制部材２１０、２２０、及び２３０のそれぞれの固定部２１２、２２２、及び２３２は、本体部１２に固定されている。具体的には、固定部２１２、２２２、及び２３２は、補強部材１００を介して本体部１２に固定されている。この固定には、溶接、または、ボルト若しくはリベットによる締結が用いられる。 As shown in FIGS. 2 and 3 to 6 above, the restricting member 200 includes a contact portion 201 that abuts on the upper surface 11a of the lid body 11 that is opposite to the main body portion 12 and a main body. It has a fixed portion 202 fixed to the portion 12. The contact portion 201 abuts on the upper surface 11a to restrict movement in the direction away from the opening 15 (see FIG. 2) of the lid 11. The regulating member 200 is made of a metal such as iron or an aluminum alloy. In the present embodiment, the power storage device 1 is provided with three regulation members 200 (210, 220, and 230) as shown in FIGS. 2 and 3. That is, the regulating member 210 has a contact portion 211 and a fixing portion 212, the regulating member 220 has a contact portion 221 and a fixing portion 222, and the regulating member 230 has a contact portion 231 and a fixing portion. It has 232 and. The fixing portions 212, 222, and 232 of the three regulating members 210, 220, and 230, respectively, are fixed to the main body portion 12. Specifically, the fixing portions 212, 222, and 232 are fixed to the main body portion 12 via the reinforcing member 100. Welding or fastening with bolts or rivets is used for this fixing.
当接部２０１は上面１１ａに直接当接していてもよいし、他の部材を間に介して上面１１ａに間接的に当接していてもよい。 The contact portion 201 may be in direct contact with the upper surface 11a, or may be indirectly in contact with the upper surface 11a with another member in between.
　補強部材１００は、外装体１０の４つの壁部１３に沿うように形成された、上面視（Ｚ軸方向プラス側から見た場合）において環状の部材である。本実施の形態では、図３に示すように、外装体１０が有する４つの壁部１３は、外装体１０の短側面を形成する壁部１３ａ及び１３ｃと、外装体１０の長側面を形成する壁部１３ｂ及び１３ｄとに区別される。つまり、規制部材２１０の固定部２１２は、壁部１３ｂに対向して配置されている。規制部材２２０の固定部２２２は、壁部１３ａに対向して配置されている。規制部材２３０の固定部２３２は、壁部１３ｃ及び１３ｄに対向して配置されている。 The reinforcing member 100 is an annular member formed along the four wall portions 13 of the exterior body 10 in a top view (when viewed from the plus side in the Z-axis direction). In the present embodiment, as shown in FIG. 3, the four wall portions 13 included in the exterior body 10 form the wall portions 13a and 13c forming the short side surface of the exterior body 10 and the long side surface of the exterior body 10. It is distinguished from the wall portions 13b and 13d. That is, the fixing portion 212 of the regulating member 210 is arranged so as to face the wall portion 13b. The fixing portion 222 of the regulating member 220 is arranged so as to face the wall portion 13a. The fixing portion 232 of the regulating member 230 is arranged so as to face the wall portions 13c and 13d.
　補強部材１００は、規制部材２００と同じく、鉄またはアルミニウム合金等の金属で形成された部材であり、図３に示すように、外装体１０との間にスペーサ１５１及び１５２を介在させた状態で外装体１０に固定される。スペーサ１５１及び１５２は、マイカまたは樹脂で形成された部材であり、外装体１０よりも剛性の高い補強部材１００から外装体１０を保護し、また、外装体１０と補強部材１００とを電気的に絶縁する部材である。当該部材としては、マイカ成形品、または、外装体１０と同じく、ＰＰ、ＰＣ、またはＰＥ等の電気的な絶縁性を有する樹脂が採用される。 Like the regulating member 200, the reinforcing member 100 is a member made of a metal such as iron or an aluminum alloy, and as shown in FIG. 3, the spacers 151 and 152 are interposed between the reinforcing member 100 and the exterior body 10. It is fixed to the exterior body 10. The spacers 151 and 152 are members made of mica or resin, protect the exterior body 10 from the reinforcing member 100 having a higher rigidity than the exterior body 10, and electrically protect the exterior body 10 and the reinforcing member 100. It is a member that insulates. As the member, a mica molded product or a resin having electrical insulation such as PP, PC, or PE is adopted as in the case of the exterior body 10.
　本実施の形態では、複数の規制部材２００の当接部２０１は、図４に示すように、蓋体１１の上面１１ａにおける周縁部を下方（Ｚ軸方向マイナス側）に押さえるように配置されている。また、上面１１ａは、上面視において４つの辺を有する略矩形であり、３つの規制部材２００によって、当該４つの辺それぞれの中央部を含む範囲が押さえられている。従って、外装体１０の内圧が上昇することで、蓋体１１が、本体部１２から外れるように変形また変位しようとした場合であっても、これら３つの規制部材２００によってその変形または変位は抑制される。 In the present embodiment, as shown in FIG. 4, the contact portions 201 of the plurality of regulating members 200 are arranged so as to press the peripheral edge portion on the upper surface 11a of the lid 11 downward (minus side in the Z-axis direction). There is. Further, the upper surface 11a is a substantially rectangular shape having four sides in a top view, and the range including the central portion of each of the four sides is suppressed by the three regulating members 200. Therefore, even if the lid 11 is deformed or displaced so as to be detached from the main body 12 due to the increase in the internal pressure of the exterior body 10, the deformation or displacement is suppressed by these three regulating members 200. Will be done.
　規制部材２００の当接部２０１によって、蓋体１１の本体部１２から外れる方向の移動が規制される蓋体１１は、図５及び図６に示すように、接合部１４において本体部１２に接合されている。この接合の手法としては、熱溶着または接着等の、接合後における着脱を不可能とする接合手法（言い換えると、着脱を前提としない接合手法）が採用される。つまり、蓋体１１を本体部１２に接合した後には、蓋体１１及び本体部１２の少なくとも一方の破壊、破損、または変形等を伴わずに蓋体１１を本体部１２から取り外すことは実質的に不可能である。また、熱溶着等によって形成される接合部１４は、図７に示すように、本体部１２の開口部１５（図２参照）の周縁に位置している。これにより、外装体１０は、開口部１５の位置において高い気密性を確保することができる。 As shown in FIGS. 5 and 6, the lid 11 whose movement in the direction away from the main body 12 of the lid 11 is restricted by the contact portion 201 of the regulating member 200 is joined to the main body 12 at the joint portion 14. Has been done. As this joining method, a joining method that makes it impossible to attach / detach after joining (in other words, a joining method that does not assume attachment / detachment) such as heat welding or adhesion is adopted. That is, after the lid 11 is joined to the main body 12, it is practically possible to remove the lid 11 from the main body 12 without destroying, damaging, or deforming at least one of the lid 11 and the main body 12. Is impossible. Further, as shown in FIG. 7, the joint portion 14 formed by heat welding or the like is located on the peripheral edge of the opening portion 15 (see FIG. 2) of the main body portion 12. As a result, the exterior body 10 can ensure high airtightness at the position of the opening 15.
　このように、本実施の形態に係る蓄電装置１は、蓄電素子２０を収容する本体部１２、及び、本体部１２の開口部１５に一体的に接合されている状態で開口部１５を塞ぐ蓋体１１を有する外装体１０と、規制部材２００と、を備える。規制部材２００は、蓋体１１の、本体部１２とは反対側の面である上面１１ａに当接することで、蓋体１１の開口部１５から離れる向きの移動を規制する当接部２０１と、本体部１２に固定された固定部２０２とを有する。 As described above, the power storage device 1 according to the present embodiment has a main body 12 for accommodating the power storage element 20 and a lid for closing the opening 15 in a state of being integrally joined to the opening 15 of the main body 12. An exterior body 10 having a body 11 and a regulating member 200 are provided. The regulating member 200 has an abutting portion 201 that regulates the movement of the lid 11 in a direction away from the opening 15 of the lid 11 by abutting the upper surface 11a, which is a surface opposite to the main body 12. It has a fixing portion 202 fixed to the main body portion 12.
　この構成によれば、蓋体１１が本体部１２の開口部１５に一体的に接合されていることで、外装体１０は、開口部１５の位置において高い気密性を確保することができる。この場合、蓄電素子２０からガスが排出されたとき、外装体１０の内圧は急激に上昇し、その結果、蓋体１１は、本体部１２から外される方向に作用する大きい内圧を受けることになる。具体的には、蓄電素子２０が開弁してガスが排出された場合、気密または準気密状態にある外装体１０の内圧が急激に上昇する。この場合、排気管９０からのガスの排出が内圧の上昇に追い付かずに、外装体１０の内圧が増加する、または、内圧が高い状態に維持される場合がある。この場合、蓋体１１が高い内圧を受けることで、蓋体１１と本体部１２との接合部分である接合部１４に割れ等の損傷が発生する可能性もある。しかしながら、本実施の形態に係る蓄電装置１では、外装体１０の内圧が上昇することで、蓋体１１に膨張または移動などの変形または変位が生じようとした場合、その上面１１ａに規制部材２００の当接部２０１が当接することで蓋体１１の変形または変位を抑制することができる。さらに、規制部材２００は、固定部２０２において本体部１２に固定されているため、当接部２０１による蓋体１１のはずれ止め部材または変形抑制部材としての実効性が確保される。このように、本実施の形態に係る蓄電装置１によれば、安全性を向上させることができる。 According to this configuration, since the lid 11 is integrally joined to the opening 15 of the main body 12, the exterior body 10 can secure high airtightness at the position of the opening 15. In this case, when the gas is discharged from the power storage element 20, the internal pressure of the exterior body 10 rises sharply, and as a result, the lid body 11 receives a large internal pressure acting in the direction of being removed from the main body portion 12. Become. Specifically, when the power storage element 20 opens and the gas is discharged, the internal pressure of the exterior body 10 in an airtight or semi-airtight state rises sharply. In this case, the exhaust gas from the exhaust pipe 90 may not catch up with the increase in the internal pressure, and the internal pressure of the exterior body 10 may increase or the internal pressure may be maintained in a high state. In this case, when the lid body 11 receives a high internal pressure, damage such as cracks may occur in the joint portion 14 which is a joint portion between the lid body 11 and the main body portion 12. However, in the power storage device 1 according to the present embodiment, when the internal pressure of the exterior body 10 rises and the lid 11 is about to be deformed or displaced such as expanding or moving, the regulating member 200 is placed on the upper surface 11a thereof. The deformation or displacement of the lid 11 can be suppressed by the contact portion 201 of the lid 11. Further, since the regulating member 200 is fixed to the main body portion 12 at the fixing portion 202, the effectiveness of the contact portion 201 as a detachment prevention member or deformation suppressing member of the lid 11 is ensured. As described above, according to the power storage device 1 according to the present embodiment, the safety can be improved.
　本実施の形態において、本体部１２には、第一方向（Ｘ軸方向）に並んで配置された複数の蓄電素子２０が収容されている。規制部材２００の当接部２０１は、蓋体１１を上面１１ａの側から見た場合において、蓋体１１の第一方向（Ｘ軸方向）の端縁部の、第一方向（Ｘ軸方向）と交差する第二方向（Ｙ軸方向）における中央部に配置されている。 In the present embodiment, the main body 12 accommodates a plurality of power storage elements 20 arranged side by side in the first direction (X-axis direction). The contact portion 201 of the regulating member 200 is the first direction (X-axis direction) of the edge portion of the lid 11 in the first direction (X-axis direction) when the lid 11 is viewed from the side of the upper surface 11a. It is arranged in the central part in the second direction (Y-axis direction) intersecting with.
　このように、本実施の形態では、蓋体１１のＸ軸方向の端縁部（Ｙ軸方向に延在する端縁部）において最も膨らみやすいＹ軸方向の中央部に当接部２０１が当接するよう配置されている。そのため、蓋体１１の膨らみ（変形）をより効率よく抑制することができる。このことは、蓄電装置１の安全性の向上に寄与する。 As described above, in the present embodiment, the contact portion 201 hits the central portion in the Y-axis direction where the lid 11 is most likely to swell at the end edge portion in the X-axis direction (the edge portion extending in the Y-axis direction). Arranged to touch. Therefore, the swelling (deformation) of the lid 11 can be suppressed more efficiently. This contributes to the improvement of the safety of the power storage device 1.
　本実施の形態において、固定部２０２は、図１～図３に示されるように、本体部１２の側方において、蓋体１１の側から、蓋体１１と本体部１２との並び方向である第三方向（Ｚ軸方向）における中央部を越える位置まで延設されている。 In the present embodiment, as shown in FIGS. 1 to 3, the fixing portion 202 is arranged side by side of the main body portion 12 from the side of the lid body 11 with the lid body 11 and the main body portion 12. It extends to a position beyond the central portion in the third direction (Z-axis direction).
　この構成によれば、固定部２０２は、Ｚ軸方向における比較的に広い範囲に配置されていることで、本体部１２の壁部１３を保護または補強する部材としても機能することができる。このことも蓄電装置１の安全性の向上に寄与する。 According to this configuration, since the fixed portion 202 is arranged in a relatively wide range in the Z-axis direction, it can also function as a member that protects or reinforces the wall portion 13 of the main body portion 12. This also contributes to the improvement of the safety of the power storage device 1.
　本実施の形態に係る蓄電装置１はさらに、本体部１２の壁部１３の外側に配置され、本体部１２に固定された補強部材１００を備える。固定部２０２は補強部材１００に固定されている。 The power storage device 1 according to the present embodiment further includes a reinforcing member 100 arranged outside the wall portion 13 of the main body portion 12 and fixed to the main body portion 12. The fixing portion 202 is fixed to the reinforcing member 100.
　この構成によれば、補強部材１００が壁部１３の膨らみを抑制するとともに、規制部材２００が蓋体１１の変形または変位を抑制することができる。つまり、規制部材２００と補強部材１００との組み合わせにより、外装体１０の全体に対する補強効果を得ることができる。これにより、蓄電装置１の安全性をさらに向上させることができる。また、規制部材２００は直接的には補強部材１００に固定されるため、溶接または締結などの作業が容易である。 According to this configuration, the reinforcing member 100 can suppress the swelling of the wall portion 13, and the regulating member 200 can suppress the deformation or displacement of the lid body 11. That is, the combination of the regulating member 200 and the reinforcing member 100 can obtain a reinforcing effect on the entire exterior body 10. Thereby, the safety of the power storage device 1 can be further improved. Further, since the regulating member 200 is directly fixed to the reinforcing member 100, operations such as welding or fastening are easy.
　さらに、規制部材２００が有する固定部２０２は、補強部材１００の剛性を向上させる機能も有している。具体的には、図６に示すように、補強部材１００の外側に固定部２０２が配置されて補強部材１００の外面に溶接等によって接合されている。従って、規制部材２００は、補強部材１００の剛性を向上させる部材、または、補強部材１００の厚みを増加させる部材として機能する。すなわち、規制部材２００の固定部２０２は、補強部材１００による補強機能を向上させることができる。また、補強部材１００の上端面に対向する位置には、図６に示すように、本体部１２の壁部１３の外面に設けられたリブ１３ｅが配置されている。そのため、リブ１３ｅは、蓄電装置１の製造時における補強部材１００の位置決めとして機能するとともに、蓄電装置１の使用時における補強部材１００の上方（Ｚ軸方向プラス側の方向）への移動を規制する部位としても機能する。従って、仮に、当接部２０１が上向きに大きな力を受けた場合であっても、規制部材２００が固定された補強部材１００は、リブ１３ｅと当接することで上方への移動は実質的に不可能である。その結果、当接部２０１は、より確実に蓋体１１の変形または変位を抑制することができる。図６では、補強部材１００は、厚み方向に２枚の板状の部材が重ね合わされることで構成されているが、この構成は一例であり、補強部材１００は、単一の材料で構成されていてもよい。 Further, the fixing portion 202 of the regulating member 200 also has a function of improving the rigidity of the reinforcing member 100. Specifically, as shown in FIG. 6, the fixing portion 202 is arranged on the outside of the reinforcing member 100 and is joined to the outer surface of the reinforcing member 100 by welding or the like. Therefore, the regulating member 200 functions as a member for improving the rigidity of the reinforcing member 100 or a member for increasing the thickness of the reinforcing member 100. That is, the fixing portion 202 of the regulating member 200 can improve the reinforcing function by the reinforcing member 100. Further, as shown in FIG. 6, ribs 13e provided on the outer surface of the wall portion 13 of the main body portion 12 are arranged at positions facing the upper end surface of the reinforcing member 100. Therefore, the rib 13e functions as a positioning of the reinforcing member 100 during the manufacture of the power storage device 1 and regulates the movement of the reinforcing member 100 upward (the direction on the plus side in the Z-axis direction) when the power storage device 1 is used. It also functions as a part. Therefore, even if the contact portion 201 receives a large upward force, the reinforcing member 100 to which the regulating member 200 is fixed is substantially unable to move upward by contacting with the rib 13e. It is possible. As a result, the contact portion 201 can more reliably suppress the deformation or displacement of the lid body 11. In FIG. 6, the reinforcing member 100 is configured by superimposing two plate-shaped members in the thickness direction. This configuration is an example, and the reinforcing member 100 is composed of a single material. You may be.
　本実施の形態において、蓋体１１と本体部１２とは、図５～図７に示すように、開口部１５の周縁に位置する接合部１４において接合されている。上面１１ａの側から見た場合における当接部２０１の配置領域の少なくとも一部は、接合部１４と重複している。具体的には、図５～図７に示すように、４つの当接部２０１（当接部２１１、当接部２２１、及び２つの当接部２３１）の配置領域のそれぞれは、接合部１４の延在方向における一部と重複し、接合部１４の、延在方向に直交する幅方向の全部または一部と重複している。 In the present embodiment, the lid body 11 and the main body portion 12 are joined at a joint portion 14 located on the peripheral edge of the opening 15 as shown in FIGS. 5 to 7. At least a part of the arrangement area of the contact portion 201 when viewed from the side of the upper surface 11a overlaps with the joint portion 14. Specifically, as shown in FIGS. 5 to 7, each of the arrangement regions of the four contact portions 201 (contact portion 211, contact portion 221 and two contact portions 231) is the joint portion 14. It overlaps with a part of the extending direction, and overlaps with all or a part of the joint portion 14 in the width direction orthogonal to the extending direction.
　このように、本実施の形態では、蓋体１１と本体部１２とが溶着または接着等によって接合された部分（接合部１４）の直上に当接部２０１が位置する。そのため、当接部２０１は、接合部１４の割れ等の損傷を効果的に抑制することができる。これにより、接合部１４が損傷することによる内部のガス漏れ等の発生可能性が低減される。このことは、蓄電装置１の安全性の向上に寄与する。 As described above, in the present embodiment, the contact portion 201 is located directly above the portion (joint portion 14) where the lid body 11 and the main body portion 12 are joined by welding or adhesion. Therefore, the contact portion 201 can effectively suppress damage such as cracking of the joint portion 14. As a result, the possibility of internal gas leakage or the like due to damage to the joint portion 14 is reduced. This contributes to the improvement of the safety of the power storage device 1.
　規制部材２００と補強部材１００との関係に着目すると、本実施の形態に係る蓄電装置１は、次のように説明することもできる。蓄電装置１は、本体部１２の壁部１３の外側に配置され、本体部１２に固定された、規制部材２００とは別体の補強部材１００とを備える。固定部２０２は、本体部１２の側方において、蓋体１１の側から、蓋体１１と本体部１２との並び方向である高さ方向（Ｚ軸方向）における中央部を越える位置まで延設されており、かつ、補強部材１００に固定されている。 Focusing on the relationship between the regulating member 200 and the reinforcing member 100, the power storage device 1 according to the present embodiment can also be described as follows. The power storage device 1 includes a reinforcing member 100 which is arranged outside the wall portion 13 of the main body portion 12 and is fixed to the main body portion 12 and is separate from the regulation member 200. The fixing portion 202 extends from the side of the lid 11 to a position beyond the central portion in the height direction (Z-axis direction), which is the alignment direction of the lid 11 and the main body 12, on the side of the main body 12. And is fixed to the reinforcing member 100.
　この構成によれば、規制部材２００と補強部材１００とは互いに別体（別部材）であるため、規制部材２００の形状及び大きさ等の自由度が高い。従って、規制部材２００を、蓋体１１の位置規制により適した形状または大きさにすることができる。また、規制部材２００は、補強部材１００に固定されていることで、構造上、規制部材２００と補強部材１００とは、互いの剛性を向上させる関係に置かれる。つまり、規制部材２００と補強部材１００との組み合わせにより、外装体１０の全体に対するより高い補強効果を得ることができる。さらに、固定部２０２が、高さ方向における比較的に広い範囲に配置されるため、本体部１２の壁部１３を保護または補強する部材としても機能することができる。これらのことは蓄電装置の安全性の向上に寄与する。 According to this configuration, since the regulating member 200 and the reinforcing member 100 are separate bodies (separate members), the degree of freedom in the shape and size of the regulating member 200 is high. Therefore, the regulating member 200 can be made into a shape or size more suitable for the position regulation of the lid 11. Further, since the regulating member 200 is fixed to the reinforcing member 100, the regulating member 200 and the reinforcing member 100 are structurally placed in a relationship of improving the rigidity of each other. That is, by combining the regulating member 200 and the reinforcing member 100, a higher reinforcing effect on the entire exterior body 10 can be obtained. Further, since the fixing portion 202 is arranged in a relatively wide range in the height direction, it can also function as a member for protecting or reinforcing the wall portion 13 of the main body portion 12. These things contribute to the improvement of the safety of the power storage device.
　（変形例）
　以上、本発明に係る蓄電装置について、実施の形態に基づいて説明した。しかしながら、本発明は、上記実施の形態に限定されるものではない。本発明の趣旨を逸脱しない限り、当業者が思いつく各種変形を上記実施の形態に施したものも、本発明の範囲内に含まれる。 (Modification example)
The power storage device according to the present invention has been described above based on the embodiment. However, the present invention is not limited to the above-described embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are also included in the scope of the present invention.
　本実施の形態では、上面視における蓋体１１の４辺のそれぞれを押さえるように３つの規制部材２００が配置されているが、１つの規制部材２００によって、蓋体１１の１辺のみが押さえられてもよい。本体部１２または蓋体１１の形状等の制約により、接合部１４の面積または体積が比較的に小さいことで、蓋体１１の４辺の内の１辺における接合力が他よりも弱い場合を想定する。この場合、当該１辺のみを押さえるように、１つの規制部材２００が外装体１０に配置されてもよい。これにより、蓋体１１と本体部１２との接合部１４の損傷等の不具合の発生可能性が低減される。 In the present embodiment, three regulating members 200 are arranged so as to press each of the four sides of the lid 11 in the top view, but only one side of the lid 11 is pressed by one regulating member 200. You may. When the area or volume of the joint portion 14 is relatively small due to restrictions such as the shape of the main body portion 12 or the lid body 11, the joint force on one side of the four sides of the lid body 11 is weaker than the other. Suppose. In this case, one regulating member 200 may be arranged on the exterior body 10 so as to hold down only the one side. This reduces the possibility of problems such as damage to the joint portion 14 between the lid body 11 and the main body portion 12.
　本実施の形態では、３つの規制部材２００のうちの１つである規制部材２３０は、図３及び図４に示すように、上面視における蓋体１１の隣り合う２辺を押さえるように構成されている。しかし、これら２辺のそれぞれに、互いの別体の規制部材２００が配置されてもよい。つまり、規制部材２００の形状、個数及び配置レイアウトは、図１～図７に示される形状、個数及び配置レイアウトには限定されない。２つの壁部１３ａ及び１３ｃ（図３参照）のそれぞれの外側に配置される固定部２０２が、本体部１２の底面側で接続された形状の規制部材２００が外装体１０に固定されてもよい。この場合、１枚の金属板に対して折り曲げ加工等を施すことで、上面視における蓋体１１の４辺のうちの互いに対向する２辺を押さえる１つの規制部材２００を作製することができる。また、この規制部材２００のうちの、本体部１２の底面の外側に位置する部分（２つの固定部２０２の連結部分）が、２つの当接部２０１の上方への移動を規制する部位として機能する。そのため、規制部材２００による、蓋体１１の膨らみ（変形）についてのより高い抑制効果を得ることができる。 In the present embodiment, the regulation member 230, which is one of the three regulation members 200, is configured to hold down two adjacent sides of the lid 11 in the top view as shown in FIGS. 3 and 4. ing. However, regulatory members 200 that are separate from each other may be arranged on each of these two sides. That is, the shape, number, and layout of the regulating members 200 are not limited to the shapes, numbers, and layouts shown in FIGS. 1 to 7. A restricting member 200 having a shape in which the fixing portion 202 arranged on the outside of each of the two wall portions 13a and 13c (see FIG. 3) is connected on the bottom surface side of the main body portion 12 may be fixed to the exterior body 10. .. In this case, by bending one metal plate or the like, one regulating member 200 that presses two opposite sides of the four sides of the lid 11 in the top view can be manufactured. Further, in the regulating member 200, a portion located outside the bottom surface of the main body portion 12 (a connecting portion of the two fixing portions 202) functions as a portion for restricting the upward movement of the two contact portions 201. do. Therefore, it is possible to obtain a higher effect of suppressing the swelling (deformation) of the lid 11 by the regulating member 200.
　固定部２０２を、上面視で矩形環状に形成することで、本体部１２の４つの壁部１３（１３ａ～１３ｄ）の外面を囲むように固定部２０２を配置し、その固定部２０２が、蓋体１１の４辺を押さえる４つの当接部２０１を有してもよい。つまり、本実施の形態に係る補強部材１００と３つの規制部材２００との組み合わせによる形状（図３参照）と同様の形状を有する１つの規制部材２００が、外装体１０に固定されてもよい。言い換えると、規制部材２００及び補強部材１００は互いに別体でなくてもよい。つまり、規制部材２００及び補強部材１００の一方が他方に一体に備えられていてもよい。 By forming the fixing portion 202 in a rectangular ring shape when viewed from above, the fixing portion 202 is arranged so as to surround the outer surfaces of the four wall portions 13 (13a to 13d) of the main body portion 12, and the fixing portion 202 is a lid. It may have four contact portions 201 that press the four sides of the body 11. That is, one regulating member 200 having the same shape as the shape of the combination of the reinforcing member 100 and the three regulating members 200 according to the present embodiment (see FIG. 3) may be fixed to the exterior body 10. In other words, the regulating member 200 and the reinforcing member 100 do not have to be separate from each other. That is, one of the regulating member 200 and the reinforcing member 100 may be integrally provided on the other.
　このように、蓄電装置１は、規制部材２００を少なくとも１つ有すればよく、１つの規制部材２００が有する当接部２０１の数も１以上であればよい。さらに、１つの当接部２０１は、蓋体１１の上面１１ａに当接するように配置されていればよい。つまり、１つの当接部２０１は、蓋体１１の上面１１ａの少なくとも一部を押さえるように規制部材２００に設けられていればよい。 As described above, the power storage device 1 may have at least one regulating member 200, and the number of contact portions 201 possessed by one regulating member 200 may be one or more. Further, one contact portion 201 may be arranged so as to come into contact with the upper surface 11a of the lid body 11. That is, one contact portion 201 may be provided on the regulating member 200 so as to press at least a part of the upper surface 11a of the lid body 11.
　補強部材１００及び規制部材２００のそれぞれは、金属で形成されている必要はない。補強部材１００及び規制部材２００のそれぞれは、繊維強化プラスチック等の剛性の高い非金属材料で形成されていてもよい。これにより、蓄電装置１を軽量化することができる。 Each of the reinforcing member 100 and the regulating member 200 does not have to be made of metal. Each of the reinforcing member 100 and the regulating member 200 may be made of a highly rigid non-metallic material such as fiber reinforced plastic. As a result, the weight of the power storage device 1 can be reduced.
　蓄電装置１は、補強部材１００を備えなくてもよい。蓄電装置１は、蓋体１１の変形または変位を抑制する部材として、少なくとも規制部材２００を備えることで、上述のように安全性を向上させることができる。また、蓄電装置１が補強部材１００を備えない場合、規制部材２００は、固定部２０２が、本体部１２に係合、嵌合、埋設、接着、溶着、または締結等によって固定されることで、本体部１２に固定されてもよい。 The power storage device 1 does not have to include the reinforcing member 100. As described above, the power storage device 1 can be improved in safety by including at least the regulation member 200 as a member for suppressing the deformation or displacement of the lid 11. Further, when the power storage device 1 does not include the reinforcing member 100, the regulating member 200 is fixed by engaging, fitting, embedding, adhering, welding, fastening, or the like with the fixing portion 202 to the main body portion 12. It may be fixed to the main body 12.
　上記説明された複数の構成要素を任意に組み合わせて構築される形態も、本発明の範囲内に含まれる。 The form constructed by arbitrarily combining the plurality of components described above is also included in the scope of the present invention.
　本発明は、リチウムイオン二次電池などの蓄電素子２０を備えた蓄電装置に適用できる。 The present invention can be applied to a power storage device provided with a power storage element 20 such as a lithium ion secondary battery.
　　　１　蓄電装置
　　１０　外装体
　　１１　蓋体
　　１１ａ　上面
　　１２　本体部
　　１３、１３ａ、１３ｂ、１３ｃ、１３ｄ　壁部
　　１３ｅ　リブ
　　１４　接合部
　　１５　開口部
　　２０　蓄電素子
　１００　補強部材
　２００、２１０、２２０、２３０　規制部材
　２０１、２１１、２２１、２３１　当接部
　２０２、２１２、２２２、２３２　固定部 1 Power storage device 10 Exterior body 11 Lid body 11a Top surface 12 Main body 13, 13a, 13b, 13c, 13d Wall 13e Rib 14 Joint 15 Opening 20 Power storage element 100 Reinforcing member 200, 210, 220, 230 Regulatory member 201, 211, 221 and 231 contact parts 202, 212, 222, 232 fixing parts

Claims (6)

  1. 　蓄電素子を収容する本体部、及び、前記本体部の開口部に一体的に接合されている状態で前記開口部を塞ぐ蓋体を有する外装体と、
    　前記蓋体の、前記本体部とは反対側の面である上面に当接することで、前記蓋体の前記開口部から離れる方向の移動を規制する当接部と、前記本体部に固定された固定部とを有する規制部材と、
    　を備える蓄電装置。     A main body that houses the power storage element, and an exterior body that has a lid that closes the opening while being integrally joined to the opening of the main body.
    By contacting the upper surface of the lid body, which is a surface opposite to the main body portion, the contact portion that regulates the movement of the lid body in the direction away from the opening is fixed to the main body portion. A regulatory member with a fixed portion and
    A power storage device equipped with.
  2. 　前記本体部には、第一方向に並んで配置された複数の前記蓄電素子が収容されており、
    　前記規制部材の前記当接部は、前記蓋体の上面視において、前記蓋体の前記第一方向の端縁部の、前記第一方向と交差する第二方向における中央部に配置されている、
    　請求項１記載の蓄電装置。     A plurality of the power storage elements arranged side by side in the first direction are housed in the main body portion.
    The contact portion of the regulating member is arranged at the central portion of the edge portion of the lid body in the first direction in the second direction intersecting with the first direction in the top view of the lid body. ,
    The power storage device according to claim 1.
  3. 　前記固定部は、前記本体部の側方において、前記蓋体と前記本体部との並び方向である第三方向における前記本体部の中央部を越える位置まで延設されている、
    　請求項１または２記載の蓄電装置。     The fixing portion extends to a position beyond the central portion of the main body portion in the third direction, which is the alignment direction of the lid body and the main body portion, on the side of the main body portion.
    The power storage device according to claim 1 or 2.
  4. 　さらに、前記本体部の壁部の外側に配置され、前記本体部に固定された補強部材を備え、
    　前記固定部は前記補強部材に固定されている、
    　請求項１～３のいずれか一項に記載の蓄電装置。     Further, a reinforcing member arranged outside the wall portion of the main body portion and fixed to the main body portion is provided.
    The fixing portion is fixed to the reinforcing member,
    The power storage device according to any one of claims 1 to 3.
  5. 　前記蓋体と前記本体部とは、前記開口部の周縁に位置する接合部において接合されており、
    　前記蓋板の前記上面視における前記当接部の配置領域の少なくとも一部は、前記接合部と重なっている、
    　請求項１～４のいずれか一項に記載の蓄電装置。     The lid body and the main body portion are joined at a joint portion located on the peripheral edge of the opening.
    At least a part of the arrangement area of the contact portion in the top view of the lid plate overlaps with the joint portion.
    The power storage device according to any one of claims 1 to 4.
  6. 　さらに、前記本体部の壁部の外側に配置され、前記本体部に固定された、前記規制部材とは別体の補強部材とを備え、
    　前記固定部は、前記本体部の側方において、前記蓋体と前記本体部との並び方向における前記本体部の中央部を越える位置まで延設されており、かつ、前記補強部材に固定されている、
    　請求項１または２記載の蓄電装置。     Further, it is provided with a reinforcing member that is arranged outside the wall portion of the main body portion and fixed to the main body portion, which is separate from the regulating member.
    The fixing portion extends to a position beyond the central portion of the main body portion in the alignment direction of the lid body and the main body portion on the side of the main body portion, and is fixed to the reinforcing member. Yes,
    The power storage device according to claim 1 or 2.
PCT/JP2021/013167 2020-03-30 2021-03-29 Power storage device WO2021200772A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09120809A (en) * 1995-10-24 1997-05-06 Matsushita Electric Ind Co Ltd Storage battery
WO2014156022A1 (en) * 2013-03-29 2014-10-02 三洋電機株式会社 Cell block
JP2019003846A (en) * 2017-06-16 2019-01-10 株式会社Ｇｓユアサ Power storage device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6915370B2 (en) 2017-05-12 2021-08-04 株式会社Ｇｓユアサ Power storage device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09120809A (en) * 1995-10-24 1997-05-06 Matsushita Electric Ind Co Ltd Storage battery
WO2014156022A1 (en) * 2013-03-29 2014-10-02 三洋電機株式会社 Cell block
JP2019003846A (en) * 2017-06-16 2019-01-10 株式会社Ｇｓユアサ Power storage device

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